CVE-2025-11163 Overview
CVE-2025-11163 affects the SmartCrawl SEO checker, analyzer & optimizer plugin for WordPress. The plugin exposes an update_submodule() function that lacks a proper capability check. Authenticated attackers with Subscriber-level access or above can invoke the function and modify plugin settings without authorization. All versions up to and including 3.14.3 are affected. The flaw is categorized as Broken Access Control [CWE-284].
Critical Impact
Any authenticated WordPress user, including low-privilege Subscribers, can modify SmartCrawl SEO plugin settings, enabling site-wide SEO manipulation on affected installations.
Affected Products
- SmartCrawl SEO checker, analyzer & optimizer plugin for WordPress
- All versions up to and including 3.14.3
- WordPress sites where the plugin is active with open user registration
Discovery Timeline
- 2025-09-30 - CVE-2025-11163 published to the National Vulnerability Database (NVD)
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-11163
Vulnerability Analysis
The vulnerability resides in the update_submodule() function within class-submodule-controller.php. The handler is registered as an AJAX or REST endpoint accessible to authenticated users but omits a current_user_can() capability check. WordPress plugins typically restrict configuration changes to Administrators using the manage_options capability. Because the check is missing, any logged-in user, including the default Subscriber role, can trigger settings updates.
The practical impact is unauthorized modification of plugin configuration. Attackers can toggle SEO submodules, alter metadata handling, or disable SEO-related security controls exposed through the plugin. The confidentiality impact is none and the availability impact is none, but integrity of the plugin's stored settings is compromised.
Root Cause
The root cause is a missing authorization control in the request handler. The endpoint validates that the caller is authenticated but does not verify the caller holds a capability appropriate for administrative changes. This is a canonical Broken Access Control weakness [CWE-284] where the authentication check is confused with an authorization check.
Attack Vector
Exploitation requires a valid WordPress account with Subscriber privileges or higher. On sites permitting open registration, this precondition is trivially met. The attacker sends a crafted request to the vulnerable update_submodule() endpoint with a valid nonce and session cookie, supplying attacker-controlled settings values. No user interaction is required from an administrator.
For technical details, see the WordPress SmartCrawl Code Snippet at the vulnerable line, the WordPress SmartCrawl Changeset containing the fix, and the Wordfence Vulnerability Report.
Detect Identity Attacks the Moment Authentication Fails
Singularity™ Identity surfaces credential misuse, lateral movement, and privilege escalation in real time, so you can contain the breach before it spreads.
Stop Identity AttacksDetection Methods for CVE-2025-11163
Indicators of Compromise
- Unexpected changes to SmartCrawl plugin settings recorded in the WordPress wp_options table.
- POST requests to admin-ajax.php or REST routes invoking update_submodule originating from non-administrative user sessions.
- New or recently registered Subscriber accounts that subsequently issue plugin configuration requests.
Detection Strategies
- Review WordPress web server access logs for requests targeting the class-submodule-controller.php handler by low-privilege users.
- Enable an audit-logging plugin to record option changes and correlate them with the initiating user role.
- Compare current SmartCrawl settings against a known-good baseline to identify unauthorized modifications.
Monitoring Recommendations
- Alert on any HTTP request to plugin AJAX or REST endpoints executed by users whose role is subscriber or contributor.
- Monitor the WordPress user_register action for atypical spikes in low-privilege account creation.
- Forward WordPress and web server logs to a centralized SIEM or data lake for correlation across authentication and configuration-change events.
How to Mitigate CVE-2025-11163
Immediate Actions Required
- Update the SmartCrawl SEO plugin to the version released after 3.14.3 that includes the fix from changeset 3366486.
- Audit existing WordPress user accounts and remove unnecessary Subscriber-level accounts.
- Review current SmartCrawl plugin settings and restore any unauthorized modifications from backup.
Patch Information
The vendor addressed the issue in the WordPress SmartCrawl Changeset, which adds the missing capability check to the update_submodule() handler. Administrators should apply the update through the WordPress plugin dashboard or via WP-CLI.
Workarounds
- Disable open user registration by unchecking Settings → General → "Anyone can register" until the patch is applied.
- Temporarily deactivate the SmartCrawl SEO plugin on sites where updating is not immediately possible.
- Restrict access to wp-admin/admin-ajax.php and REST API endpoints using a web application firewall rule that blocks the vulnerable action for non-administrative sessions.
# Update SmartCrawl SEO plugin via WP-CLI
wp plugin update smartcrawl-seo
# Verify installed version is greater than 3.14.3
wp plugin get smartcrawl-seo --field=version
# Disable open registration as a temporary workaround
wp option update users_can_register 0
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
