CVE-2023-46085: Wpmet Wp Ultimate Review CSRF Vulnerability

CVE-2023-46085 Overview

CVE-2023-46085 is a Cross-Site Request Forgery (CSRF) vulnerability affecting the Wpmet Wp Ultimate Review plugin for WordPress. This security flaw exists in versions 2.2.4 and earlier, allowing attackers to perform unauthorized actions on behalf of authenticated users without their consent.

Critical Impact

Attackers can exploit this CSRF vulnerability to manipulate review functionality, potentially altering, deleting, or creating reviews by tricking authenticated administrators or users into visiting malicious web pages.

Affected Products

• Wpmet Wp Ultimate Review plugin versions <= 2.2.4
• WordPress installations using vulnerable versions of the plugin

Discovery Timeline

• 2023-10-22 - CVE-2023-46085 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2023-46085

Vulnerability Analysis

This Cross-Site Request Forgery vulnerability occurs when the Wp Ultimate Review plugin fails to implement proper anti-CSRF token validation on sensitive operations. The plugin does not adequately verify that requests originate from legitimate, authenticated user sessions within the WordPress administrative interface.

When a user with appropriate permissions is logged into WordPress and visits a malicious page crafted by an attacker, the browser automatically includes session cookies with any requests made to the WordPress site. Without CSRF token verification, the plugin cannot distinguish between legitimate user actions and forged requests initiated by the attacker's malicious page.

Root Cause

The root cause of CVE-2023-46085 lies in the absence or improper implementation of nonce verification in the Wp Ultimate Review plugin. WordPress provides the wp_nonce_field() and wp_verify_nonce() functions specifically to protect against CSRF attacks. The vulnerable versions of this plugin either fail to generate security nonces for form submissions or neglect to validate incoming nonces before processing requests that modify review data.

Attack Vector

The attack vector is network-based and requires user interaction. An attacker must craft a malicious HTML page containing hidden forms or JavaScript that automatically submits requests to the vulnerable plugin endpoints. The attack sequence typically involves:

1. The attacker identifies plugin endpoints lacking CSRF protection
2. A malicious page is created that submits requests to these endpoints
3. The attacker entices an authenticated WordPress administrator to visit the malicious page
4. The victim's browser automatically includes session cookies, authenticating the forged request
5. The plugin processes the request as if it were legitimate, performing the attacker's desired action

Since no verified code examples are available for this vulnerability, administrators should consult the Patchstack Vulnerability Advisory for detailed technical information about the specific vulnerable endpoints and attack methodology.

Detection Methods for CVE-2023-46085

Indicators of Compromise

• Unexpected changes to review content, ratings, or metadata in the WordPress database
• Review submissions or deletions occurring at unusual times or in unusual patterns
• Server logs showing requests to Wp Ultimate Review plugin endpoints from external referrers
• Unauthorized modifications to plugin settings without administrator action

Detection Strategies

• Monitor WordPress audit logs for review-related actions that lack corresponding administrator sessions
• Implement web application firewall rules to detect requests to plugin endpoints with suspicious referer headers
• Review Apache or Nginx access logs for POST requests to plugin endpoints originating from external domains
• Deploy real-time monitoring for changes to the wp_posts and related tables where review data is stored

Monitoring Recommendations

• Enable WordPress debug logging to capture plugin activity anomalies
• Configure alerting for bulk review modifications or deletions
• Implement Content Security Policy headers to reduce the risk of cross-origin request forgery
• Regularly audit plugin versions across all WordPress installations to identify outdated components

How to Mitigate CVE-2023-46085

Immediate Actions Required

• Update Wp Ultimate Review plugin to a version newer than 2.2.4 immediately
• Audit recent review activity for unauthorized modifications
• Review WordPress user accounts for any suspicious privilege escalations
• Temporarily disable the plugin if an update is not immediately available

Patch Information

Users should update the Wp Ultimate Review plugin to the latest available version through the WordPress admin dashboard or by downloading directly from the WordPress plugin repository. The vendor, Wpmet, should be contacted directly for patch availability information. Refer to the Patchstack Vulnerability Advisory for the most current patch status.

Workarounds

• Implement a Web Application Firewall (WAF) with CSRF protection rules targeting the plugin endpoints
• Restrict administrative access to trusted IP addresses using .htaccess or server-level firewall rules
• Educate administrators about the risks of clicking unknown links while logged into WordPress
• Consider using browser extensions that isolate administrative sessions from general browsing

# Example .htaccess rule to restrict wp-admin access by IP
<Directory /var/www/html/wp-admin>
    Order Deny,Allow
    Deny from all
    Allow from 192.168.1.100
    Allow from 10.0.0.0/24
</Directory>