CVE-2025-66102
📋 TL;DR
This Cross-Site Scripting (XSS) vulnerability in the FolioVision FV Antispam WordPress plugin allows attackers to inject malicious scripts into web pages viewed by other users. The vulnerability affects all WordPress sites running FV Antispam version 2.7 or earlier. Attackers can exploit this to steal session cookies, redirect users, or perform actions on their behalf.
💻 Affected Systems
- FolioVision FV Antispam 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 administrator session cookies, gain administrative access to WordPress sites, install backdoors, deface websites, or compromise user data.
Likely Case
Attackers steal user session cookies to hijack accounts, redirect users to malicious sites, or display phishing content to visitors.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before reaching users, preventing exploitation.
🎯 Exploit Status
Reflected XSS vulnerabilities typically require user interaction (clicking a malicious link) but are relatively easy to exploit once discovered.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.8 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find FV Antispam and click 'Update Now'. 4. Verify the plugin version is 2.8 or higher.
🔧 Temporary Workarounds
Disable FV Antispam Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate fv-antispam
Implement WAF Rules
allAdd web application firewall rules to block XSS payloads targeting the vulnerable endpoint
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution
- Use browser security features like HttpOnly cookies to limit cookie theft impact
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for FV Antispam version 2.7 or lowerCheck Version:
wp plugin list --name=fv-antispam --field=versionVerify Fix Applied:
Verify FV Antispam plugin version is 2.8 or higher in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual GET/POST requests containing script tags or JavaScript payloads to FV Antispam endpoints
- Multiple failed login attempts following suspicious URL visits
Network Indicators:
- HTTP requests containing <script> tags or JavaScript in URL parameters
- Traffic patterns showing users being redirected to unexpected domains
SIEM Query:
source="web_server_logs" AND (uri="*fv-antispam*" AND (uri="*<script>*" OR uri="*javascript:*" OR uri="*onload=*"))