CVE-2025-13685 Overview
CVE-2025-13685 is a Cross-Site Request Forgery (CSRF) vulnerability affecting the Photo Gallery by Ays plugin for WordPress in all versions up to and including 6.4.8. The vulnerability exists due to missing nonce verification on the bulk action functionality within the process_bulk_action() function. This security flaw enables unauthenticated attackers to perform unauthorized bulk operations—including deleting, publishing, or unpublishing galleries—through forged requests when they successfully trick an administrator into clicking a malicious link.
Critical Impact
Unauthenticated attackers can manipulate gallery content through CSRF attacks, potentially causing data loss or unauthorized content modifications on WordPress sites using the vulnerable plugin.
Affected Products
- Photo Gallery by Ays plugin for WordPress versions ≤ 6.4.8
- WordPress installations with Photo Gallery by Ays plugin (gallery-photo-gallery)
Discovery Timeline
- 2025-12-02 - CVE-2025-13685 published to NVD
- 2025-12-02 - Last updated in NVD database
Technical Details for CVE-2025-13685
Vulnerability Analysis
This vulnerability is classified as CWE-352 (Cross-Site Request Forgery) and has been assigned a CVSS 3.1 score of 4.3 (Medium severity) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N. The EPSS score is 0.024% (5.731 percentile), indicating a relatively low probability of exploitation in the wild.
The vulnerability resides in the class-gallery-photo-gallery-list-table.php file, specifically at line 1060 where the process_bulk_action() function handles bulk operations. The function fails to implement proper nonce verification, which is a critical security mechanism in WordPress that validates whether form submissions originate from legitimate, authenticated sessions.
Root Cause
The root cause of CVE-2025-13685 is the absence of nonce token verification in the bulk action processing function. In WordPress security best practices, nonces (number used once) serve as cryptographic tokens that verify the authenticity and intent of form submissions. Without this verification, the plugin cannot distinguish between legitimate administrator actions and forged requests initiated by attackers.
The process_bulk_action() function processes bulk operations such as delete, publish, and unpublish without validating that the request contains a valid nonce token associated with the administrator's session.
Attack Vector
The attack vector for this vulnerability is network-based with low attack complexity but requires user interaction. An attacker exploits this vulnerability through the following mechanism:
- The attacker crafts a malicious HTML page containing a forged form that targets the vulnerable bulk action endpoint
- The forged form is pre-populated with gallery IDs and the desired bulk action (delete, publish, or unpublish)
- The attacker lures an authenticated WordPress administrator to visit the malicious page through social engineering techniques such as phishing emails or malicious links
- When the administrator visits the page, their browser automatically submits the forged request using their existing authenticated session
- The plugin processes the request without nonce verification, executing the bulk action with the administrator's privileges
The attack does not require authentication from the attacker's perspective, but it does require tricking an authenticated administrator into triggering the malicious request.
Detection Methods for CVE-2025-13685
Indicators of Compromise
- Unexpected modifications to photo gallery status (published/unpublished)
- Unexplained deletion of photo galleries without administrator action
- Administrator reports of clicking suspicious links prior to gallery changes
- Web server logs showing POST requests to gallery bulk action endpoints from external referrers
Detection Strategies
Organizations can detect potential exploitation attempts by implementing the following strategies:
Log Analysis: Monitor WordPress and web server logs for bulk action requests to the Photo Gallery plugin that originate from external referrers or contain unusual patterns. Look for POST requests to the gallery-photo-gallery administrative endpoints with referrer headers pointing to external domains.
User Activity Monitoring: Implement audit logging for gallery modifications to track when galleries are deleted, published, or unpublished. Correlate these events with administrator login sessions to identify unauthorized actions.
Web Application Firewall (WAF) Rules: Configure WAF rules to detect and block requests that appear to be CSRF attacks targeting WordPress plugins, particularly those with missing or invalid nonce tokens in the request body.
Monitoring Recommendations
Organizations should enable comprehensive WordPress audit logging to capture all administrative actions. Security teams should also monitor for unusual patterns in gallery management activities, such as bulk deletions occurring outside normal business hours or from unexpected IP addresses. Consider implementing real-time alerting for critical gallery operations to ensure rapid detection of potential attacks.
How to Mitigate CVE-2025-13685
Immediate Actions Required
- Update Photo Gallery by Ays plugin to version 6.4.9 or later immediately
- Review recent gallery activity logs for any unauthorized modifications
- Educate administrators about the risks of clicking links from untrusted sources
- Consider temporarily disabling the plugin if immediate patching is not possible
Patch Information
The vulnerability has been addressed in Photo Gallery by Ays plugin version 6.4.9. The patch introduces proper nonce verification in the process_bulk_action() function, ensuring that bulk operations can only be executed when accompanied by a valid, session-specific nonce token.
The fix can be reviewed in the WordPress plugins changeset at:
For additional vulnerability details, consult the Wordfence threat intelligence advisory at:
Workarounds
If immediate patching is not feasible, organizations can implement the following temporary mitigations:
Restrict Administrative Access: Limit WordPress administrative access to trusted IP addresses using .htaccess rules or hosting provider firewall configurations.
Implement Additional Security Headers: Deploy Content Security Policy (CSP) headers to reduce the risk of administrators loading malicious external content that could trigger CSRF attacks.
# Example .htaccess configuration to restrict wp-admin access
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{REQUEST_URI} ^/wp-admin
RewriteCond %{REMOTE_ADDR} !^192\.168\.1\.100$
RewriteRule ^(.*)$ - [F,L]
</IfModule>
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
