CVE-2025-28862: Comment Date Gravatar Remover CSRF Flaw

CVE-2025-28862 Overview

CVE-2025-28862 is a Cross-Site Request Forgery (CSRF) vulnerability affecting the WordPress "Comment Date and Gravatar remover" plugin developed by Venugopal. This vulnerability allows attackers to trick authenticated administrators into performing unintended actions by exploiting the lack of proper CSRF token validation in the plugin's request handling.

CSRF vulnerabilities enable attackers to craft malicious web pages or links that, when visited by an authenticated user, can execute unauthorized actions on the target application without the user's knowledge or consent. In WordPress environments, this can lead to significant security breaches including unauthorized configuration changes and potential site compromise.

Critical Impact

Attackers can leverage this CSRF vulnerability to hijack administrator sessions and perform unauthorized actions, potentially leading to full site compromise with high impact on confidentiality, integrity, and availability.

Affected Products

• Venugopal Comment Date and Gravatar Remover version 1.0 and earlier
• WordPress installations using the remove-date-and-gravatar-under-comment plugin

Discovery Timeline

• 2025-03-11 - CVE-2025-28862 published to NVD
• 2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-28862

Vulnerability Analysis

This Cross-Site Request Forgery vulnerability stems from inadequate request validation within the Comment Date and Gravatar remover plugin for WordPress. The plugin fails to implement proper nonce verification for state-changing operations, allowing attackers to craft malicious requests that execute actions in the context of an authenticated administrator.

When a logged-in WordPress administrator visits a malicious page controlled by an attacker, their browser automatically includes authentication cookies with any requests made to the WordPress site. Without CSRF protection, the plugin processes these forged requests as legitimate, executing whatever actions the attacker specified.

The vulnerability requires user interaction—the victim must visit a malicious page or click a crafted link while authenticated to the WordPress admin panel. However, given that administrators often browse the web while logged into their sites, this attack vector is highly practical.

Root Cause

The root cause of CVE-2025-28862 is the absence of CSRF token (nonce) validation in the plugin's administrative functions. WordPress provides built-in security functions such as wp_nonce_field() for form protection and wp_verify_nonce() for validation, but the vulnerable plugin fails to implement these safeguards.

Properly secured WordPress plugins should generate unique tokens for each user session and validate these tokens before processing any state-changing requests. The Comment Date and Gravatar remover plugin's omission of this critical security control leaves it vulnerable to request forgery attacks.

Attack Vector

An attacker exploiting CVE-2025-28862 would typically follow this methodology:

1. Reconnaissance: Identify WordPress sites running the vulnerable Comment Date and Gravatar remover plugin version 1.0 or earlier
2. Payload Crafting: Create a malicious HTML page containing auto-submitting forms or JavaScript that generates requests to the target WordPress site's plugin endpoints
3. Delivery: Trick an authenticated WordPress administrator into visiting the malicious page through phishing emails, forum posts, or compromised websites
4. Execution: When the administrator visits the attacker's page, the forged requests execute automatically, performing unauthorized actions with the administrator's privileges

The attack requires no prior authentication on the target system and can be launched from any external website, making it particularly dangerous for WordPress administrators who browse the web while logged into their sites.

Detection Methods for CVE-2025-28862

Indicators of Compromise

• Unexpected changes to comment display settings without administrator action
• Unusual HTTP POST requests to plugin endpoints from external referrers
• Administrator account activity logs showing actions performed during periods of inactivity
• Browser history on admin workstations showing visits to suspicious external sites coinciding with configuration changes

Detection Strategies

• Monitor WordPress audit logs for plugin settings modifications that lack corresponding administrative intent
• Implement web application firewall (WAF) rules to detect requests with suspicious or missing Referer headers to sensitive plugin endpoints
• Review server access logs for POST requests to the plugin's administrative URLs originating from external domains
• Deploy endpoint detection to identify administrators clicking links in suspicious emails or visiting known malicious domains

Monitoring Recommendations

• Enable comprehensive WordPress activity logging using security plugins that track all administrative actions
• Configure alerts for any changes to the Comment Date and Gravatar remover plugin settings
• Implement Content Security Policy (CSP) headers to restrict form submissions to same-origin destinations
• Monitor for HTTP requests to WordPress admin endpoints that lack the expected WordPress nonce parameters

How to Mitigate CVE-2025-28862

Immediate Actions Required

• Evaluate whether the Comment Date and Gravatar remover plugin is essential for your WordPress site and consider removing it if not critical
• Implement a Web Application Firewall with CSRF protection rules to provide an additional layer of defense
• Advise WordPress administrators to use separate browser profiles for administrative tasks and general web browsing
• Review recent plugin configuration changes for any unauthorized modifications

Patch Information

As of the last update to this CVE, no patched version of the Comment Date and Gravatar remover plugin has been confirmed. Organizations should monitor the Patchstack Vulnerability Report for updates on remediation status and any vendor patches.

Given the lack of an available patch, removing the plugin entirely is the most effective mitigation strategy until a secure version is released.

Workarounds

• Deactivate and remove the Comment Date and Gravatar remover plugin until a patched version is available
• Implement custom CSRF protection at the server level using .htaccess rules or server-side middleware to validate Referer headers for administrative requests
• Use browser extensions or enterprise policies that isolate WordPress administrative sessions from general browsing
• Consider alternative plugins that provide similar functionality with proper security controls implemented

# WordPress CLI command to deactivate the vulnerable plugin
wp plugin deactivate remove-date-and-gravatar-under-comment

# Verify plugin is deactivated
wp plugin status remove-date-and-gravatar-under-comment

# Optional: Remove the plugin entirely
wp plugin delete remove-date-and-gravatar-under-comment