CVE-2025-9949 Overview
CVE-2025-9949 affects the Internal Links Manager plugin for WordPress in all versions up to and including 3.0.1. The vulnerability is a Cross-Site Request Forgery (CSRF) flaw caused by missing or incorrect nonce validation in the process_bulk_action() function that handles link deletion. Unauthenticated attackers can delete SEO links by tricking an authenticated site administrator into clicking a crafted link or visiting a malicious page. The plugin, distributed as seo-automated-link-building, is used to manage internal linking structures for search engine optimization on WordPress sites. The flaw is tracked under CWE-352: Cross-Site Request Forgery.
Critical Impact
Attackers can remotely delete SEO internal links on affected WordPress sites by tricking an administrator into interacting with a forged request, degrading site SEO integrity.
Affected Products
- Internal Links Manager plugin for WordPress (seo-automated-link-building)
- All versions up to and including 3.0.1
- WordPress sites using the vulnerable plugin with administrative sessions active
Discovery Timeline
- 2025-09-20 - CVE-2025-9949 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-9949
Vulnerability Analysis
The vulnerability resides in the process_bulk_action() function of the Internal Links Manager plugin. This function processes bulk operations, including deletion, against stored SEO links. The function does not perform a proper WordPress nonce check before executing the deletion logic. Without nonce validation, the plugin cannot verify that a state-changing request originated from a legitimate administrator-initiated action within the WordPress admin interface. Any HTTP request reaching the vulnerable endpoint with a valid administrator session cookie is treated as authorized, regardless of origin.
Root Cause
The root cause is missing or incorrect implementation of anti-CSRF tokens (WordPress nonces) on a state-changing action. WordPress provides wp_nonce_field(), wp_create_nonce(), and check_admin_referer() / wp_verify_nonce() APIs to prevent CSRF. The process_bulk_action() function omits or incorrectly applies these controls, allowing forged cross-origin requests to succeed under the administrator's session context.
Attack Vector
An attacker crafts a malicious web page or link containing a request targeting the plugin's bulk action endpoint with parameters that invoke the delete action against specific link IDs. The attacker then social-engineers a logged-in WordPress administrator into visiting the attacker-controlled page or clicking a specific link. The victim's browser automatically sends session cookies, and the plugin executes the deletion. Successful exploitation requires user interaction from a privileged user and does not require attacker authentication. The impact is limited to integrity — deletion of SEO link configuration data — without direct code execution or data disclosure.
See the Wordfence Vulnerability Analysis and the WordPress Plugin Changeset for the technical fix reference.
Detection Methods for CVE-2025-9949
Indicators of Compromise
- Unexpected removal of internal SEO links managed by the Internal Links Manager plugin without corresponding administrator audit trail entries.
- HTTP POST or GET requests to WordPress admin endpoints for seo-automated-link-building with a Referer header pointing to an external, untrusted domain.
- Administrator browser sessions preceded by visits to unfamiliar URLs shortly before link deletions occur.
Detection Strategies
- Inspect web server access logs for requests to the plugin's bulk action handler that lack a valid WordPress nonce parameter (_wpnonce).
- Correlate SEO link deletion events with the originating Referer header to identify cross-origin requests.
- Monitor WordPress database changes to plugin tables and compare against the site's change management records.
Monitoring Recommendations
- Enable WordPress audit logging plugins to record all administrative actions with source IP, user agent, and referer metadata.
- Alert on bulk delete operations affecting plugin data outside normal administrator working hours.
- Track administrator account activity for anomalous request patterns immediately following external link clicks or email interactions.
How to Mitigate CVE-2025-9949
Immediate Actions Required
- Update the Internal Links Manager plugin to a version later than 3.0.1 as soon as a patched release is available from the WordPress plugin repository.
- Deactivate the plugin if a patched version is not yet available and the SEO link management feature is not business-critical.
- Instruct administrators to log out of WordPress before browsing untrusted sites and to avoid clicking unsolicited links while authenticated.
Patch Information
A fix is referenced in the WordPress Plugin Changeset 3362770 for the seo-automated-link-building repository. Administrators should verify the installed plugin version against the latest release published on the official plugin page and apply updates through the WordPress dashboard.
Workarounds
- Deploy a web application firewall (WAF) rule that blocks POST requests to the plugin's bulk action endpoint when the Referer header does not match the site's own domain.
- Restrict administrative access to the WordPress dashboard by IP allowlisting at the web server or reverse proxy layer.
- Enforce short session lifetimes and require re-authentication for sensitive administrative actions to reduce the window of CSRF exposure.
# Example: Apache mod_rewrite rule to block cross-origin POSTs to the plugin endpoint
RewriteEngine On
RewriteCond %{REQUEST_METHOD} POST
RewriteCond %{REQUEST_URI} seo-automated-link-building [NC]
RewriteCond %{HTTP_REFERER} !^https?://(www\.)?your-domain\.com/ [NC]
RewriteRule .* - [F,L]
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
