CVE-2025-53311 Overview
CVE-2025-53311 is a Cross-Site Request Forgery (CSRF) vulnerability in the Navayan Subscribe WordPress plugin developed by Amol Nirmala Waman. The flaw affects all versions up to and including 1.13. Successful exploitation enables an attacker to perform a stored Cross-Site Scripting (XSS) attack by tricking an authenticated administrator into submitting a forged request. The injected payload persists in the plugin's stored data and executes in the browser of any user who visits the affected page. The vulnerability maps to CWE-352: Cross-Site Request Forgery.
Critical Impact
An unauthenticated attacker can chain CSRF with stored XSS to execute arbitrary JavaScript in an administrator's browser session, leading to account takeover or site compromise.
Affected Products
- Navayan Subscribe WordPress plugin (navayan-subscribe)
- All versions from n/a through 1.13
- Vendor: Amol Nirmala Waman
Discovery Timeline
- 2025-06-27 - CVE-2025-53311 published to NVD
- 2026-04-23 - Last updated in NVD database
Technical Details for CVE-2025-53311
Vulnerability Analysis
The Navayan Subscribe plugin fails to validate the origin of state-changing HTTP requests. WordPress provides nonce tokens through wp_nonce_field() and check_admin_referer() to defend against forged requests, but the affected plugin endpoints do not enforce these checks. An attacker who hosts a malicious page can craft an HTML form or JavaScript request that submits attacker-controlled input to the plugin when a logged-in administrator visits the page.
Because the submitted data is then stored without proper output encoding or input sanitization, the payload becomes a persistent (stored) XSS vector. Subsequent visits to the affected admin or front-end view trigger script execution in the victim's browser. The combination converts a single victim click into a persistent compromise of the WordPress installation.
Root Cause
The root cause is the absence of CSRF protection on plugin request handlers combined with insufficient sanitization of user-supplied data before storage and rendering. The plugin does not verify a valid WordPress nonce, and it does not apply functions such as sanitize_text_field() or esc_html() on the affected fields.
Attack Vector
Exploitation requires user interaction. An attacker lures an authenticated WordPress administrator to a malicious or compromised page. That page issues a cross-origin POST request to a vulnerable plugin endpoint. The request is processed using the victim's session, the malicious payload is stored, and JavaScript executes when the stored content is rendered. No prior authentication or privileges are required from the attacker side.
No verified public proof-of-concept code is available. See the Patchstack WordPress Vulnerability Report for the technical advisory.
Detection Methods for CVE-2025-53311
Indicators of Compromise
- Unexpected <script> tags, event handlers (onerror=, onload=), or encoded payloads in stored subscriber or plugin configuration fields.
- New or modified WordPress administrator accounts that did not originate from an authorized change.
- Outbound requests from administrator browsers to unfamiliar domains shortly after visiting plugin admin pages.
Detection Strategies
- Audit the WordPress database tables and plugin options used by navayan-subscribe for HTML or JavaScript content in fields that should contain plain text.
- Inspect web server access logs for POST requests to plugin endpoints lacking a valid _wpnonce parameter or Referer header from the same origin.
- Review browser security headers and Content Security Policy reports for blocked inline script executions on /wp-admin/ pages.
Monitoring Recommendations
- Monitor administrator session activity for anomalous form submissions originating from external referrers.
- Alert on creation or modification of WordPress user accounts with administrator capabilities.
- Track plugin file integrity and database changes for the navayan-subscribe plugin until a patched release is confirmed.
How to Mitigate CVE-2025-53311
Immediate Actions Required
- Deactivate and remove the Navayan Subscribe plugin from any WordPress site running version 1.13 or earlier until a patched release is published.
- Force a password reset for all WordPress administrator accounts and invalidate active sessions.
- Review subscriber data and plugin configuration for injected scripts and remove malicious entries.
Patch Information
As of the last NVD update on 2026-04-23, no fixed version is listed in the advisory. Track the Patchstack advisory for vendor-supplied fixes and update to a patched version when available.
Workarounds
- Restrict access to /wp-admin/ using IP allow-listing or VPN to reduce the chance that administrators encounter attacker-controlled pages while authenticated.
- Deploy a Web Application Firewall (WAF) rule that blocks cross-origin POST requests to navayan-subscribe endpoints lacking a valid WordPress nonce.
- Enforce a strict Content Security Policy on the WordPress admin interface to block inline script execution.
- Train administrators to log out of WordPress when not actively managing the site to limit CSRF exposure.
# Example: disable the vulnerable plugin via WP-CLI
wp plugin deactivate navayan-subscribe
wp plugin delete navayan-subscribe
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
