CVE-2025-6041 Overview
CVE-2025-6041 is a Cross-Site Request Forgery (CSRF) vulnerability in the yContributors plugin for WordPress. The flaw affects all versions up to and including 0.5. The plugin's yContributors administrative page fails to implement proper nonce validation, allowing unauthenticated attackers to forge requests that modify plugin settings. A successful attack requires tricking a site administrator into clicking a malicious link. Because attacker-controlled input can be persisted through settings updates, the CSRF can be chained to inject malicious web scripts that execute in the administrator's browser context.
Critical Impact
Attackers can modify plugin settings and inject stored web scripts into administrator sessions by exploiting missing nonce validation on the yContributors admin page.
Affected Products
- yContributors plugin for WordPress, all versions through 0.5
- WordPress installations with yContributors installed and activated
- Sites where administrators can be targeted with social engineering
Discovery Timeline
- 2025-07-04 - CVE-2025-6041 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-6041
Vulnerability Analysis
The vulnerability is a Cross-Site Request Forgery weakness classified under [CWE-352]. The yContributors plugin exposes an administrative settings page but does not verify a valid WordPress nonce token when processing POST submissions. WordPress provides wp_nonce_field() and check_admin_referer() as the standard mechanism to bind form submissions to an authenticated session, and these controls are absent or incorrectly applied on the affected page.
Because of this missing anti-CSRF check, the plugin cannot distinguish between a legitimate administrator submitting the settings form and a browser executing an attacker-crafted request from an external origin. Attackers can host a malicious page containing an auto-submitting form or image tag targeting the plugin's admin endpoint. When an authenticated administrator visits the page, the browser sends the request with valid session cookies, and the plugin processes the settings update.
The secondary impact is script injection. Since the settings values are stored and later rendered without adequate sanitization or escaping, attackers can persist JavaScript payloads via the forged request. This produces stored Cross-Site Scripting behavior triggered through a CSRF entry point.
Root Cause
The root cause is missing or incorrect nonce validation on the yContributors settings handler in ycontributors_admin.php. Without check_admin_referer() or wp_verify_nonce() guarding the settings update path, WordPress relies only on cookie-based session authentication, which browsers automatically attach to cross-site requests.
Attack Vector
The attack is network-based and requires user interaction. An attacker crafts a web page containing a hidden form that submits to the vulnerable WordPress admin endpoint. The attacker delivers the link through phishing, forum posts, or comments. When a logged-in administrator visits the page, the browser submits the forged request, updating plugin settings and injecting attacker-controlled script content. See the Wordfence Vulnerability Analysis and the WordPress Plugin Code Repository for technical references.
Detection Methods for CVE-2025-6041
Indicators of Compromise
- Unexpected modifications to yContributors plugin settings without a corresponding administrator action in audit logs
- HTTP POST requests to wp-admin pages containing yContributors parameters with Referer headers pointing to external domains
- Presence of <script> tags or JavaScript event handlers stored in yContributors configuration values
- Administrator sessions loading unexpected JavaScript from admin pages after visiting external links
Detection Strategies
- Review WordPress access logs for POST requests to the yContributors admin endpoint that lack a same-origin Referer header
- Inspect the plugin's stored options in the wp_options table for HTML or script content in configuration fields
- Deploy a Web Application Firewall rule to flag admin form submissions missing a valid _wpnonce parameter
Monitoring Recommendations
- Monitor administrator authentication events correlated with subsequent plugin settings changes
- Alert on outbound requests from administrator browsers to unfamiliar domains shortly after WordPress admin access
- Track file integrity and database changes for the yContributors plugin configuration
How to Mitigate CVE-2025-6041
Immediate Actions Required
- Deactivate the yContributors plugin until a patched version is released and verified
- Audit yContributors settings and remove any unexpected script content or unfamiliar configuration values
- Rotate administrator credentials if compromise of an admin session is suspected
- Restrict WordPress administrative access to trusted IP ranges where feasible
Patch Information
No vendor-supplied patch is referenced in the NVD entry at the time of publication. All versions up to and including 0.5 remain vulnerable. Review the WordPress Plugin Code Repository for updates and confirm any new release implements check_admin_referer() on the settings handler.
Workarounds
- Remove the yContributors plugin if it is not essential to site operations
- Instruct administrators to log out of WordPress before browsing untrusted links and to use a separate browser profile for administrative tasks
- Deploy a WAF rule that blocks POST requests to ycontributors admin pages when the Referer header does not match the site's origin
- Enforce SameSite=Strict on the WordPress authentication cookie where compatible with the deployment
# Example WAF rule concept blocking cross-origin POSTs to the plugin admin page
# ModSecurity-style pseudo rule
SecRule REQUEST_METHOD "@streq POST" \
"chain,deny,status:403,id:1006041,msg:'CVE-2025-6041 CSRF block'"
SecRule REQUEST_URI "@contains ycontributors" "chain"
SecRule &REQUEST_HEADERS:Referer "@eq 0"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
