CVE-2025-13657: WordPress HelpDesk CSRF Vulnerability

CVE-2025-13657 Overview

The HelpDesk contact form plugin for WordPress is vulnerable to Cross-Site Request Forgery (CSRF) in all versions up to, and including, 1.1.5. This vulnerability stems from missing or incorrect nonce validation on the handle_query_args() function. The flaw enables unauthenticated attackers to modify the plugin's license ID and contact form ID settings through a forged request, provided they can trick a site administrator into performing an action such as clicking on a malicious link.

Critical Impact
Unauthenticated attackers can manipulate plugin settings via CSRF, potentially disrupting contact form functionality or redirecting form submissions by changing configuration values without proper authorization.

Affected Products

HelpDesk contact form plugin for WordPress version 1.1.5 and earlier
WordPress installations using vulnerable versions of the HelpDesk contact form plugin

Discovery Timeline

January 7, 2026 - CVE-2025-13657 published to NVD
January 8, 2026 - Last updated in NVD database

Technical Details for CVE-2025-13657

Vulnerability Analysis

This Cross-Site Request Forgery vulnerability exists due to improper implementation of WordPress security nonces in the handle_query_args() function within the plugin's admin page handler. WordPress nonces are cryptographic tokens designed to protect against CSRF attacks by ensuring that requests originate from authenticated users with proper authorization. When nonce validation is missing or incorrectly implemented, the application cannot distinguish between legitimate administrative requests and forged requests initiated by malicious actors.

The vulnerability affects the plugin's settings management functionality, specifically the ability to modify license ID and contact form ID values. These settings control critical operational parameters of the plugin, and unauthorized modification could lead to service disruption or data manipulation.

Root Cause

The root cause of this vulnerability is the absence of proper nonce verification in the handle_query_args() function located in class-admin-page.php. WordPress provides built-in functions like wp_verify_nonce() and check_admin_referer() specifically to prevent CSRF attacks. The vulnerable code fails to implement these protective measures, allowing form submissions and parameter changes without validating that the request originated from a legitimate administrative session.

Attack Vector

The attack is network-based and requires user interaction. An attacker must craft a malicious webpage or link containing a forged request targeting the vulnerable function. When a logged-in WordPress administrator visits the attacker's page or clicks the malicious link, their browser automatically sends the forged request along with their valid session cookies. The plugin processes this request as if it were legitimate, updating the settings as specified by the attacker.

A typical attack scenario involves:

The attacker identifies a WordPress site using the vulnerable HelpDesk contact form plugin
The attacker crafts a malicious HTML page containing a hidden form or JavaScript that submits a request to modify plugin settings
The attacker delivers the malicious link to a site administrator via email, social media, or by embedding it on a compromised website
When the administrator clicks the link while logged into WordPress, the plugin settings are modified without their knowledge

Detection Methods for CVE-2025-13657

Indicators of Compromise

Unexpected changes to HelpDesk contact form plugin settings, particularly license ID or form ID values
Web server logs showing requests to the plugin's admin page from external referrers
Contact form submissions failing or being redirected unexpectedly
Administrator reports of clicking suspicious links prior to settings changes

Detection Strategies

Monitor WordPress plugin settings for unauthorized modifications using file integrity monitoring tools
Implement web application firewall (WAF) rules to detect and block CSRF attack patterns
Review web server access logs for unusual request patterns targeting plugin administrative endpoints
Deploy endpoint detection and response (EDR) solutions to identify suspicious browser activity

Monitoring Recommendations

Enable WordPress audit logging to track all settings changes and administrative actions
Configure alerts for plugin configuration modifications outside of scheduled maintenance windows
Implement real-time monitoring of the handle_query_args() endpoint for anomalous request patterns
Review HTTP referer headers for requests to sensitive administrative functions

How to Mitigate CVE-2025-13657

Immediate Actions Required

Update the HelpDesk contact form plugin to a version newer than 1.1.5 that includes proper nonce validation
Audit current plugin settings to verify they have not been tampered with
Educate site administrators about the risks of clicking unknown links while logged into WordPress
Consider temporarily disabling the plugin if an update is not immediately available

Patch Information

The vulnerability affects HelpDesk contact form plugin versions up to and including 1.1.5. Site administrators should update to the latest available version that addresses the CSRF vulnerability. Technical details about the vulnerable code can be found in the WordPress Plugin Repository. Additional vulnerability information is available in the Wordfence Vulnerability Report.

Workarounds

Implement a web application firewall (WAF) with CSRF protection rules to filter malicious requests
Restrict administrative access to trusted IP addresses where feasible
Use browser extensions that warn about or block cross-site request attempts
Log out of WordPress administrative sessions when not actively performing site management tasks

bash

# Example: Restrict WordPress admin access by IP in .htaccess
<Files "wp-admin">
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.0/24
    Allow from YOUR_TRUSTED_IP
</Files>