CVE-2025-31875
📋 TL;DR
This DOM-based cross-site scripting (XSS) vulnerability in the FancyPost WordPress plugin allows attackers to inject malicious scripts into web pages viewed by other users. It affects all WordPress sites using FancyPost plugin versions up to 6.0.1. Attackers could steal session cookies, redirect users, or perform actions on their behalf.
💻 Affected Systems
- Pluginic FancyPost 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
Complete site takeover through session hijacking, credential theft, defacement, or malware distribution to visitors.
Likely Case
Session hijacking leading to unauthorized access to user accounts, data theft, or privilege escalation.
If Mitigated
Limited impact if proper Content Security Policy (CSP) headers are implemented and user input validation is enforced.
🎯 Exploit Status
DOM-based XSS typically requires user interaction but can be exploited via crafted links or stored payloads.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.0.2 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find FancyPost plugin. 4. Click 'Update Now' if available. 5. Alternatively, download latest version from WordPress repository and replace plugin files.
🔧 Temporary Workarounds
Disable FancyPost Plugin
allTemporarily disable the vulnerable plugin until patched.
wp plugin deactivate fancypost
Implement Content Security Policy
allAdd CSP headers to mitigate XSS impact.
Add to .htaccess: Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
Add to nginx config: add_header Content-Security-Policy "default-src 'self'; script-src 'self'";
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block XSS payloads.
- Disable user input fields that trigger the vulnerability if identifiable.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for FancyPost version. If version ≤6.0.1, vulnerable.Check Version:
wp plugin get fancypost --field=versionVerify Fix Applied:
Verify FancyPost plugin version is 6.0.2 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST/GET requests with script tags or JavaScript payloads to FancyPost endpoints.
- Multiple failed login attempts following suspicious page visits.
Network Indicators:
- HTTP requests containing <script>, javascript:, or encoded XSS payloads in parameters.
SIEM Query:
source="web_logs" AND (uri_path="/wp-content/plugins/fancypost/" OR user_agent CONTAINS "fancypost") AND (request_body CONTAINS "<script>" OR request_body CONTAINS "javascript:")