CVE-2025-3435
📋 TL;DR
The Mang Board WP plugin for WordPress has a stored cross-site scripting vulnerability that allows authenticated administrators to inject malicious scripts into board headers and footers. This affects all versions up to 1.8.6, but only impacts multi-site installations or those where unfiltered_html capability is disabled. Injected scripts execute when users view affected pages.
💻 Affected Systems
- Mang Board WP WordPress Plugin
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Administrator account compromise leads to site takeover, data theft, or malware distribution to all visitors
Likely Case
Limited impact due to requiring admin access, potentially defacement or credential theft from logged-in users
If Mitigated
Minimal impact if proper access controls and input validation are in place
🎯 Exploit Status
Exploitation requires administrator-level WordPress access and knowledge of vulnerable parameters
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.8.7 or later
Vendor Advisory: https://plugins.trac.wordpress.org/changeset/3272163/mangboard/trunk
Restart Required: No
Instructions:
1. Log into WordPress admin panel
2. Navigate to Plugins → Installed Plugins
3. Find Mang Board WP plugin
4. Click 'Update Now' if update available
5. If no update available, download version 1.8.7+ from WordPress repository
6. Deactivate old plugin, upload new version, activate
🔧 Temporary Workarounds
Enable unfiltered_html capability
allEnable unfiltered_html for administrators to bypass vulnerability in single-site installations
Add to wp-config.php: define('DISALLOW_UNFILTERED_HTML', false);
Remove plugin
linuxTemporarily disable or remove the plugin until patched
wp plugin deactivate mangboard
wp plugin delete mangboard
🧯 If You Can't Patch
- Restrict administrator accounts to trusted personnel only
- Implement web application firewall with XSS protection rules
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Mang Board WP version. If version ≤1.8.6 and unfiltered_html is disabled or multi-site enabled, system is vulnerable.Check Version:
wp plugin get mangboard --field=versionVerify Fix Applied:
Verify plugin version is 1.8.7 or higher in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /wp-admin/admin-ajax.php with board_header or board_footer parameters containing script tags
- Multiple failed admin login attempts followed by successful login
Network Indicators:
- Injected script tags in board header/footer HTML responses
- External script loads from unexpected domains
SIEM Query:
source="wordpress" AND (uri_path="/wp-admin/admin-ajax.php" AND (param="board_header" OR param="board_footer") AND content="<script")