CVE-2025-25111 Overview
CVE-2025-25111 is a Cross-Site Request Forgery (CSRF) vulnerability affecting the WP Spell Check WordPress plugin. The flaw affects all plugin versions up to and including 9.21. An attacker can craft a malicious web page that, when visited by an authenticated WordPress user, triggers unintended state-changing requests against the target site.
The vulnerability is categorized under CWE-352 (Cross-Site Request Forgery). Exploitation requires user interaction, such as clicking a link or visiting an attacker-controlled page while authenticated. Successful abuse can lead to limited integrity and availability impact on the affected WordPress site.
Critical Impact
Attackers can trick authenticated WordPress users into executing unintended plugin actions, potentially altering plugin state or configuration without consent.
Affected Products
- WP Spell Check plugin for WordPress
- Versions from n/a through 9.21
- WordPress sites with the vulnerable plugin installed and activated
Discovery Timeline
- 2025-02-07 - CVE-2025-25111 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-25111
Vulnerability Analysis
The WP Spell Check plugin fails to implement proper CSRF protections on one or more state-changing endpoints. WordPress provides the wp_nonce_field() and check_admin_referer() primitives to defend against CSRF, but the affected plugin versions do not validate these tokens correctly on sensitive actions.
As a result, requests originating from an attacker-controlled origin are accepted by the plugin as if they were issued intentionally by the logged-in user. The attack vector is network-based and does not require prior authentication of the attacker, but it does require the victim to interact with malicious content while authenticated to the target site.
The impact is limited to low integrity and low availability effects, with no direct confidentiality impact. The scope remains unchanged, meaning the vulnerability affects only the vulnerable component itself.
Root Cause
The root cause is missing or insufficient anti-CSRF token validation on plugin request handlers. Without validating a per-session nonce tied to the requesting user, the plugin cannot distinguish forged cross-origin requests from legitimate first-party requests.
Attack Vector
An attacker hosts a malicious page containing an auto-submitting form or JavaScript that issues a request to the vulnerable WP Spell Check endpoint. When an authenticated WordPress administrator or privileged user visits the page, the browser attaches valid session cookies and executes the request. The plugin processes the request as authorized.
The vulnerability mechanism is described in the Patchstack advisory. No verified public exploit code is available at this time.
Detection Methods for CVE-2025-25111
Indicators of Compromise
- Unexpected changes to WP Spell Check plugin settings or state without corresponding admin activity logs.
- HTTP POST or GET requests to plugin endpoints with Referer headers pointing to unrelated external domains.
- Administrator sessions issuing plugin requests immediately after visiting external links or emails.
Detection Strategies
- Review WordPress audit logs for plugin configuration changes correlated with off-site referrers.
- Inspect web server access logs for requests to wp-spell-check endpoints lacking valid nonce parameters.
- Monitor for anomalous administrative actions performed outside of normal working hours or session patterns.
Monitoring Recommendations
- Enable a WordPress activity logging plugin to record all administrative actions and plugin state changes.
- Alert on requests to plugin admin endpoints originating from external Referer values.
- Track plugin version inventory across managed WordPress sites to identify hosts still running 9.21 or earlier.
How to Mitigate CVE-2025-25111
Immediate Actions Required
- Update the WP Spell Check plugin to a version released after 9.21 that includes the CSRF fix.
- If no patched version is available, deactivate and remove the WP Spell Check plugin until a fix is published.
- Force logout of all active administrator sessions and rotate credentials for privileged WordPress accounts.
Patch Information
Refer to the Patchstack advisory for current patch status and remediation details. Administrators should upgrade to any vendor-released version above 9.21 that explicitly addresses CVE-2025-25111.
Workarounds
- Restrict access to the WordPress admin interface by IP allowlisting at the web server or WAF layer.
- Deploy a WordPress security plugin or WAF rule that enforces Referer and Origin header validation on admin requests.
- Train administrators to log out of WordPress before browsing untrusted content and to use a dedicated browser profile for site administration.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
