CVE-2025-1513
📋 TL;DR
This stored XSS vulnerability in the Contest Gallery WordPress plugin allows unauthenticated attackers to inject malicious scripts into photo gallery comment fields. The scripts execute automatically when users view compromised pages, potentially compromising visitor accounts. All WordPress sites using vulnerable plugin versions are affected.
💻 Affected Systems
- Contest Gallery WordPress plugin
📦 What is this software?
Contest Gallery by Contest Gallery
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal admin session cookies, deface websites, redirect visitors to malicious sites, or install backdoors for persistent access.
Likely Case
Session hijacking of logged-in users, credential theft via fake login forms, or defacement of gallery pages.
If Mitigated
With proper CSP headers and input validation, impact limited to minor content manipulation.
🎯 Exploit Status
Attack requires no authentication and minimal technical skill.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 26.0.0.1
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Contest Gallery plugin. 4. Click 'Update Now' if available. 5. If no update, download latest version from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable gallery commenting
allTemporarily disable comment functionality in Contest Gallery settings
Implement Content Security Policy
allAdd CSP headers to block inline script execution
Add to .htaccess: Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
Or add to wp-config.php: header("Content-Security-Policy: default-src 'self'; script-src 'self'");
🧯 If You Can't Patch
- Disable the Contest Gallery plugin entirely
- Implement web application firewall with XSS protection rules
🔍 How to Verify
Check if Vulnerable:
Check plugin version in WordPress admin > Plugins > Contest Gallery. If version is 26.0.0.1 or lower, you are vulnerable.Check Version:
WordPress CLI: wp plugin list --name='contest-gallery' --field=versionVerify Fix Applied:
After update, verify plugin version is higher than 26.0.0.1. Test comment fields with basic XSS payloads like <script>alert('test')</script> to ensure sanitization works.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to gallery comment endpoints
- HTML/script tags in comment field submissions
- Multiple failed XSS attempts in web server logs
Network Indicators:
- Suspicious JavaScript in HTTP POST bodies to /wp-content/plugins/contest-gallery/ endpoints
SIEM Query:
source="web_server" AND (uri_path="/wp-content/plugins/contest-gallery/" AND (http_method="POST" AND (body="<script>" OR body="javascript:")))