CVE-2024-37543: Ultimate Auction CSRF Vulnerability

CVE-2024-37543 Overview

CVE-2024-37543 is a Cross-Site Request Forgery (CSRF) vulnerability [CWE-352] affecting the Nitesh Ultimate Auction plugin for WordPress. The flaw impacts all versions from initial release through and including 4.2.5. Attackers can trick authenticated users into performing unintended state-changing actions by crafting malicious requests. Successful exploitation requires user interaction, such as clicking a link or visiting an attacker-controlled page while logged into WordPress. The vulnerability affects integrity but does not directly expose sensitive data or degrade availability.

Critical Impact
Attackers can force authenticated WordPress users to execute plugin actions without consent, potentially modifying auction data through forged requests.

Affected Products

Nitesh Ultimate Auction WordPress plugin versions up to and including 4.2.5
WordPress sites running the ultimate-auction plugin
Deployments that have not applied the vendor security update

Discovery Timeline

2025-01-02 - CVE-2024-37543 published to the National Vulnerability Database (NVD)
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2024-37543

Vulnerability Analysis

The vulnerability resides in the Ultimate Auction plugin's request handling logic. The plugin fails to validate the origin or authenticity of state-changing HTTP requests. Attackers can craft HTML forms or JavaScript that submit requests to vulnerable endpoints on behalf of authenticated victims. Because the plugin does not verify a valid anti-CSRF token, the server processes forged requests as legitimate.

Exploitation requires a logged-in WordPress user to visit an attacker-controlled page or click a malicious link. The victim's browser automatically attaches session cookies to the forged request. The plugin then executes the requested action within the victim's authenticated context. This is a classic missing token validation issue tracked as [CWE-352].

Refer to the Patchstack CSRF Vulnerability Report for additional technical context.

Root Cause

The plugin does not implement WordPress nonce validation on sensitive request handlers. Functions such as wp_verify_nonce() or check_admin_referer() are absent or improperly used. Without a per-session, per-action token, the server cannot distinguish between requests initiated by the user and requests forged by a third party.

Attack Vector

The attack is network-based and requires user interaction. An attacker hosts a page containing a hidden form or JavaScript that targets the vulnerable plugin endpoint. When a signed-in WordPress user loads this page, the browser submits the request with the user's authentication cookies. The privilege level of the victim determines the impact of the forged action.

No verified public proof-of-concept code is available. See the linked Patchstack advisory for endpoint-specific details.

Detection Methods for CVE-2024-37543

Indicators of Compromise

Unexpected changes to auction listings, bids, or plugin settings without corresponding administrator activity in audit logs
HTTP POST or GET requests to ultimate-auction plugin endpoints with Referer headers pointing to external, untrusted domains
Concentrated request bursts to plugin action handlers immediately after a user session begins

Detection Strategies

Inspect web server logs for state-changing requests to wp-admin/admin.php or plugin AJAX handlers that lack a valid _wpnonce parameter
Correlate off-site Referer values with authenticated WordPress sessions to identify cross-origin request patterns
Deploy a Web Application Firewall (WAF) rule that flags requests to Ultimate Auction endpoints missing nonce parameters

Monitoring Recommendations

Enable WordPress audit logging to track configuration and content changes tied to specific user IDs
Monitor administrative user activity for actions performed outside expected time windows or from anomalous IP addresses
Alert on any plugin action executed while the Referer header references a domain outside the WordPress site

How to Mitigate CVE-2024-37543

Immediate Actions Required

Update the Ultimate Auction plugin to a version later than 4.2.5 once a fixed release is published by the vendor
If no patch is available, deactivate and remove the ultimate-auction plugin from production sites
Force re-authentication for all administrative WordPress users to invalidate any active sessions

Patch Information

At the time of publication, the Patchstack advisory lists all versions through 4.2.5 as affected. Administrators should consult the Patchstack CSRF Vulnerability Report and the WordPress plugin repository for the latest fixed release.

Workarounds

Restrict access to the WordPress admin interface using IP allow-listing at the web server or WAF layer
Configure browsers and WordPress to enforce SameSite=Lax or SameSite=Strict cookie attributes to reduce cross-site request risk
Require administrators to log out of WordPress before browsing untrusted sites, and use separate browser profiles for administrative work

bash

# Configuration example: enforce SameSite cookie attribute in Nginx
add_header Set-Cookie "Path=/; HttpOnly; Secure; SameSite=Strict";