CVE-2025-59583
📋 TL;DR
This DOM-based Cross-Site Scripting (XSS) vulnerability in the Penci Filter Everything WordPress plugin allows attackers to inject malicious scripts into web pages viewed by other users. The vulnerability affects all WordPress sites using vulnerable versions of this plugin, potentially compromising user sessions and site integrity.
💻 Affected Systems
- Penci Filter Everything 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 credentials, deface websites, redirect users to malicious sites, or install backdoors for persistent access.
Likely Case
Session hijacking, cookie theft, or credential harvesting from users visiting compromised pages.
If Mitigated
Limited impact with proper Content Security Policy (CSP) headers and input validation in place.
🎯 Exploit Status
DOM-based XSS requires user interaction with maliciously crafted input. No authentication bypass needed once payload is delivered.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 1.8 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'Penci Filter Everything' and click 'Update Now'. 4. Verify plugin version is 1.8 or higher.
🔧 Temporary Workarounds
Disable Plugin
WordPressTemporarily disable the vulnerable plugin until patched
wp plugin deactivate penci-filter-everything
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) with XSS protection rules
- Disable user input fields that trigger the vulnerable DOM manipulation
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for 'Penci Filter Everything' version 1.7 or lowerCheck Version:
wp plugin get penci-filter-everything --field=versionVerify Fix Applied:
Verify plugin version shows 1.8 or higher in WordPress admin📡 Detection & Monitoring
Log Indicators:
- Unusual JavaScript payloads in URL parameters
- Multiple failed XSS attempts in web server logs
Network Indicators:
- Suspicious script tags in HTTP requests
- Unusual outbound connections from user browsers
SIEM Query:
source="web_server" AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=") AND uri="*penci*"