CVE-2025-23627 Overview
CVE-2025-23627 is a Cross-Site Request Forgery (CSRF) vulnerability in the WordPress Comment-Emailer plugin by frenchsquared that enables Stored Cross-Site Scripting (XSS) attacks. This chained vulnerability allows attackers to bypass CSRF protections and inject malicious scripts that persist within the WordPress installation, potentially compromising administrator accounts and site integrity.
Critical Impact
Attackers can leverage CSRF to inject persistent XSS payloads, potentially leading to session hijacking, administrative account compromise, and complete WordPress site takeover.
Affected Products
- WordPress Comment-Emailer plugin version 1.0.5 and earlier
- WordPress installations using the comment-emailer plugin
Discovery Timeline
- 2025-01-16 - CVE-2025-23627 published to NVD
- 2026-04-15 - Last updated in NVD database
Technical Details for CVE-2025-23627
Vulnerability Analysis
This vulnerability represents a chained attack where CSRF leads to Stored XSS. The Comment-Emailer plugin fails to implement proper CSRF token validation on critical form submissions, allowing an attacker to craft malicious requests that, when executed by an authenticated administrator, inject persistent JavaScript payloads into the plugin's settings or database-stored content.
The Stored XSS component means that once the malicious script is injected, it will execute in the browser context of any user who views the affected page or administrative interface. This persistence makes the attack particularly dangerous as it does not require continued interaction from the attacker after initial exploitation.
Root Cause
The root cause is the absence of CSRF protection mechanisms (such as WordPress nonces) on plugin forms that accept and store user-controllable input. Combined with insufficient input sanitization and output encoding, this allows attackers to inject and store malicious JavaScript that executes when the stored content is rendered.
The vulnerability is classified under CWE-352 (Cross-Site Request Forgery), which occurs when a web application does not adequately verify that requests were intentionally submitted by the authenticated user who initiated them.
Attack Vector
An attacker exploits this vulnerability by crafting a malicious webpage or link that contains a hidden form or JavaScript that submits a request to the vulnerable Comment-Emailer plugin endpoint. When an authenticated WordPress administrator visits the attacker's page, the browser automatically sends the forged request along with the victim's session cookies, causing the XSS payload to be stored in the plugin's configuration.
The attack typically proceeds as follows: the attacker hosts a page containing an auto-submitting form targeting the plugin's settings endpoint, includes a JavaScript payload in the form data, and distributes the malicious link to WordPress administrators. Once an administrator visits the page while logged in, the XSS payload is stored and will execute for subsequent visitors to the affected WordPress pages.
Detection Methods for CVE-2025-23627
Indicators of Compromise
- Unexpected JavaScript code in Comment-Emailer plugin settings or database entries
- Unusual plugin configuration changes without administrative action
- Browser security warnings or anomalous script execution on WordPress admin pages
- Web application firewall logs showing suspicious form submissions to Comment-Emailer endpoints
Detection Strategies
- Review WordPress plugin settings for unauthorized modifications or injected script tags
- Monitor server access logs for requests to Comment-Emailer plugin endpoints from external referrers
- Implement Content Security Policy (CSP) headers to detect and block unauthorized inline scripts
- Deploy web application firewall rules to identify CSRF attack patterns
Monitoring Recommendations
- Enable WordPress audit logging to track all plugin configuration changes
- Configure alerts for modifications to Comment-Emailer plugin settings
- Monitor for external referrer requests to administrative plugin endpoints
- Implement real-time XSS detection through browser-based security tools
How to Mitigate CVE-2025-23627
Immediate Actions Required
- Deactivate and remove the Comment-Emailer plugin until a patched version is available
- Review and clean any stored XSS payloads from the WordPress database
- Audit administrator accounts for signs of compromise or session hijacking
- Reset administrative passwords and invalidate existing sessions as a precaution
Patch Information
As of the last update, no official patch has been released for this vulnerability. The Comment-Emailer plugin versions through 1.0.5 remain vulnerable. WordPress administrators should monitor the Patchstack Vulnerability Report for updates on remediation efforts and consider alternative plugins with active security maintenance.
Workarounds
- Remove or deactivate the Comment-Emailer plugin entirely until a security patch is released
- Implement a Web Application Firewall (WAF) with CSRF and XSS protection rules
- Restrict administrative access to trusted IP addresses only
- Use browser extensions that block automatic form submissions from untrusted origins
# WordPress CLI command to deactivate the vulnerable plugin
wp plugin deactivate comment-emailer --path=/var/www/wordpress
# Search for potential XSS payloads in the database
wp db query "SELECT * FROM wp_options WHERE option_value LIKE '%<script%'" --path=/var/www/wordpress
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
