CVE-2025-8440
📋 TL;DR
The Team Members WordPress plugin has a stored XSS vulnerability in first and last name fields due to insufficient input sanitization. Authenticated attackers with Contributor-level access or higher can inject malicious scripts that execute when users view affected pages. This affects all versions up to and including 5.3.5.
💻 Affected Systems
- Team Members 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
Attackers could steal admin credentials, deface websites, redirect users to malicious sites, or install backdoors for persistent access.
Likely Case
Attackers with contributor accounts inject malicious scripts to steal user session cookies or perform phishing attacks against site visitors.
If Mitigated
With proper user access controls and content security policies, impact is limited to potential data leakage from affected user accounts.
🎯 Exploit Status
Requires authenticated access at Contributor level or higher. Exploitation involves injecting scripts into first/last name fields.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.3.6 or later
Vendor Advisory: https://plugins.trac.wordpress.org/browser/team-members/trunk/inc/tmm-save-metaboxes.php#L77
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Team Members plugin. 4. Click 'Update Now' if available. 5. Alternatively, download version 5.3.6+ from WordPress repository and replace plugin files.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable the Team Members plugin until patched
wp plugin deactivate team-members
Restrict User Roles
allTemporarily remove Contributor role access or restrict who can edit team member profiles
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution
- Add input validation filters to sanitize first and last name fields before display
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Team Members. If version is 5.3.5 or lower, you are vulnerable.Check Version:
wp plugin get team-members --field=versionVerify Fix Applied:
After updating, verify plugin version is 5.3.6 or higher. Test by attempting to inject script tags in first/last name fields - they should be sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to team member edit endpoints
- Script tags or JavaScript in first/last name fields in database/logs
Network Indicators:
- Unexpected script loads from team member pages
- Suspicious outbound connections from team profile pages
SIEM Query:
source="wordpress" AND ("team-members" OR "tmm-save-metaboxes") AND ("script" OR "javascript" OR "onclick")🔗 References
- https://plugins.trac.wordpress.org/browser/team-members/trunk/inc/tmm-save-metaboxes.php#L77
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=3364663%40team-members%2Ftrunk&old=3116517%40team-members%2Ftrunk&sfp_email=&sfph_mail=
- https://www.wordfence.com/threat-intel/vulnerabilities/id/b46c3f25-6879-47b1-9026-4297fdd003b0?source=cve
