CVE-2025-25147: Auto SEO Plugin CSRF Vulnerability

CVE-2025-25147 Overview

A Cross-Site Request Forgery (CSRF) vulnerability has been identified in the WordPress Auto SEO plugin developed by Phillip.Gooch. This security flaw allows attackers to chain CSRF with Stored Cross-Site Scripting (XSS), enabling malicious actors to execute arbitrary JavaScript code in the context of authenticated users' browsers. The vulnerability affects all versions of the Auto SEO plugin from initial release through version 2.5.6.

Critical Impact

Attackers can exploit this CSRF vulnerability to inject persistent malicious scripts into the WordPress site, potentially compromising administrator accounts, stealing session cookies, or redirecting users to malicious websites.

Affected Products

• WordPress Auto SEO Plugin versions <= 2.5.6
• WordPress installations using the vulnerable Auto SEO plugin
• Sites where administrators access the plugin settings while authenticated

Discovery Timeline

• 2025-02-07 - CVE-2025-25147 published to NVD
• 2026-04-15 - Last updated in NVD database

Technical Details for CVE-2025-25147

Vulnerability Analysis

This vulnerability represents a chained attack vector combining Cross-Site Request Forgery (CWE-352) with Stored Cross-Site Scripting. The Auto SEO plugin fails to implement proper CSRF token validation on its settings forms, allowing attackers to craft malicious requests that modify plugin configuration when an authenticated administrator visits an attacker-controlled page. The lack of input sanitization on these settings then enables the injection of persistent JavaScript payloads.

The attack chain operates as follows: an attacker creates a malicious webpage containing a hidden form or JavaScript that automatically submits requests to the WordPress admin panel. When an authenticated administrator visits this page, the malicious request is executed with their session credentials, injecting XSS payloads into the plugin's stored settings.

Root Cause

The root cause of this vulnerability is the absence of nonce verification in the Auto SEO plugin's form handling routines. WordPress provides the wp_nonce_field() and wp_verify_nonce() functions to protect against CSRF attacks, but the Auto SEO plugin does not properly implement these security mechanisms. Additionally, the plugin fails to sanitize user input before storing it in the database, enabling the Stored XSS component of this attack chain.

Attack Vector

The attack requires social engineering to lure an authenticated WordPress administrator to a malicious webpage. The attacker's page contains a hidden form that automatically submits to the WordPress admin area, targeting the Auto SEO plugin's settings endpoint. Since no CSRF protection exists, the browser sends the request with the administrator's valid session cookies, and the malicious XSS payload is stored in the plugin's configuration.

Once the Stored XSS payload is in place, it executes every time an administrator or user views pages where the plugin's output is rendered, potentially leading to:

• Session hijacking through cookie theft
• Unauthorized administrative actions
• Defacement of the WordPress site
• Distribution of malware to site visitors
• Privilege escalation attacks

Detection Methods for CVE-2025-25147

Indicators of Compromise

• Unexpected JavaScript code in Auto SEO plugin settings or database entries
• Unusual outbound connections to unknown domains from the WordPress admin area
• Modified plugin configuration values that administrators did not change
• Browser console errors indicating blocked or suspicious script execution

Detection Strategies

• Review Apache/Nginx access logs for suspicious POST requests to Auto SEO plugin endpoints from external referrers
• Implement Content Security Policy (CSP) headers to detect and block unauthorized script execution
• Monitor WordPress database tables for unexpected HTML or JavaScript content in plugin options
• Use Web Application Firewalls (WAF) to detect CSRF attack patterns and XSS payloads

Monitoring Recommendations

• Enable WordPress audit logging to track changes to plugin settings
• Configure real-time alerts for modifications to the wp_options table entries related to Auto SEO
• Deploy browser-based XSS detection tools for administrators accessing the WordPress backend
• Regularly scan the site using WordPress security plugins that detect stored XSS payloads

How to Mitigate CVE-2025-25147

Immediate Actions Required

• Immediately deactivate and remove the Auto SEO plugin from affected WordPress installations
• Review Auto SEO plugin settings for any suspicious or unexpected content
• Inspect the WordPress database for injected JavaScript or HTML in plugin-related options
• Force logout all administrator sessions and require password resets
• Consider using an alternative SEO plugin with a strong security track record

Patch Information

At the time of publication, no official patch has been confirmed for this vulnerability. Users should monitor the Patchstack WordPress Vulnerability Report for updates regarding a security fix from the plugin developer.

Workarounds

• Disable the Auto SEO plugin until a patched version is released
• Implement a Web Application Firewall (WAF) rule to block suspicious requests to plugin endpoints
• Add custom CSRF protection by implementing WordPress nonce verification in a child theme or custom plugin
• Restrict access to the WordPress admin area using IP whitelisting or VPN requirements
• Use browser extensions that warn administrators before submitting forms to potentially unsafe destinations

# WordPress CLI command to deactivate the vulnerable plugin
wp plugin deactivate auto-seo

# Search for potential XSS payloads in WordPress options
wp db query "SELECT option_name, option_value FROM wp_options WHERE option_name LIKE '%auto_seo%';"

# Force logout all users after remediation
wp user session destroy --all