CVE-2025-13144 Overview
CVE-2025-13144 is a Cross-Site Request Forgery (CSRF) vulnerability affecting the ContentStudio plugin for WordPress. The flaw exists in all versions up to and including 1.3.7. It stems from missing or insufficient nonce validation on the add_cstu_settings function. Unauthenticated attackers can modify plugin settings by tricking a site administrator into clicking a crafted link or visiting a malicious page. The issue is tracked under [CWE-352] and carries a network attack vector requiring user interaction.
Critical Impact
Unauthenticated attackers can modify ContentStudio plugin settings on WordPress sites by exploiting missing nonce validation, provided they can lure an authenticated administrator to a malicious request.
Affected Products
- ContentStudio plugin for WordPress, all versions up to and including 1.3.7
- WordPress sites with ContentStudio installed and active
- Administrator sessions on impacted WordPress installations
Discovery Timeline
- 2025-12-05 - CVE-2025-13144 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-13144
Vulnerability Analysis
The vulnerability resides in the ContentStudio plugin's settings handler. The add_cstu_settings function processes administrative configuration changes but does not validate a WordPress nonce token before applying updates. WordPress nonces are the framework's built-in defense against CSRF, binding state-changing requests to an authenticated user session. Without this check, the endpoint accepts any request that carries the administrator's session cookie, regardless of origin.
An attacker crafts a page or link containing a forged HTTP request targeting the vulnerable endpoint. When a logged-in administrator visits the attacker-controlled resource, the browser automatically attaches session cookies. The plugin then processes the settings change as if the administrator had initiated it. The impact is limited to integrity of plugin settings, with no direct confidentiality or availability impact per the CVSS metrics.
Root Cause
The root cause is missing nonce verification in the add_cstu_settings function within contentstudio-plugin.php. WordPress provides check_admin_referer() and wp_verify_nonce() helpers specifically to prevent this class of issue. Neither is applied on the vulnerable code path, as documented in the WordPress plugin source at line 380 and line 383.
Attack Vector
Exploitation requires social engineering. The attacker hosts an HTML page that auto-submits a POST request to the target site's ContentStudio settings endpoint. The administrator must be authenticated to the WordPress site and must interact with the attacker's link or page. No credentials or prior privileges on the target site are needed by the attacker. Further technical detail is available in the Wordfence vulnerability report.
Detection Methods for CVE-2025-13144
Indicators of Compromise
- Unexpected changes to ContentStudio plugin settings without a corresponding administrator action in the audit log
- HTTP POST requests to ContentStudio settings endpoints originating from external Referer headers
- Administrator sessions producing settings updates immediately after visiting untrusted external links
Detection Strategies
- Inspect web server access logs for POST requests to ContentStudio settings paths with mismatched or missing Referer and Origin headers
- Correlate WordPress options table changes with authenticated user activity to identify unauthorized modifications
- Deploy a Web Application Firewall (WAF) rule that flags state-changing requests to the plugin lacking a valid _wpnonce parameter
Monitoring Recommendations
- Enable WordPress audit logging to capture plugin setting changes with user, timestamp, and source IP
- Monitor for anomalous administrator browsing patterns preceding configuration changes
- Alert on ContentStudio option updates outside of scheduled maintenance windows
How to Mitigate CVE-2025-13144
Immediate Actions Required
- Update the ContentStudio plugin to a version newer than 1.3.7 that includes the fix from WordPress Changeset #3412182
- If no patched version is available for your deployment, deactivate and remove the ContentStudio plugin
- Review recent ContentStudio settings for unauthorized modifications and restore known-good values
Patch Information
The vendor addressed the missing nonce validation in WordPress Changeset #3412182. Site administrators should upgrade through the WordPress plugin dashboard or by replacing the plugin files with the patched release. Verify the installed version after upgrade to confirm the fix is applied.
Workarounds
- Restrict administrator browsing sessions to trusted sites and use separate browser profiles for WordPress administration
- Enforce a WAF rule requiring a valid _wpnonce parameter on requests to admin.php actions targeting ContentStudio
- Apply the principle of least privilege by limiting the number of accounts with administrator capabilities
# Example WAF rule (ModSecurity) requiring nonce on ContentStudio settings requests
SecRule REQUEST_URI "@contains contentstudio" \
"chain,id:1013144,phase:2,deny,status:403,msg:'CVE-2025-13144 CSRF protection'"
SecRule REQUEST_METHOD "@streq POST" "chain"
SecRule &ARGS:_wpnonce "@eq 0"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
