CVE-2025-59587
📋 TL;DR
This DOM-based cross-site scripting vulnerability in the Penci Shortcodes & Performance WordPress plugin allows attackers to inject malicious scripts that execute in users' browsers when viewing compromised pages. It affects all WordPress sites using vulnerable versions of this plugin, potentially compromising visitor sessions and site integrity.
💻 Affected Systems
- PenciDesign Penci Shortcodes & Performance 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 visitors to malicious sites, or install backdoors for persistent access.
Likely Case
Session hijacking of logged-in users, cookie theft, or displaying malicious content to visitors.
If Mitigated
Limited impact with proper content security policies and user awareness training.
🎯 Exploit Status
Requires user interaction with malicious content; exploitation depends on specific plugin usage patterns.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.1
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'Penci Shortcodes & Performance'. 4. Click 'Update Now' if available. 5. Alternatively, download version 6.1+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable Plugin
WordPressTemporarily disable the vulnerable plugin until patched.
wp plugin deactivate penci-shortcodes-performance
Implement Content Security Policy
allAdd CSP headers to restrict script execution sources.
Add to .htaccess: Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
Or use WordPress security plugins to implement CSP
🧯 If You Can't Patch
- Remove plugin entirely and find alternative shortcode solutions
- Implement web application firewall with XSS protection rules
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Penci Shortcodes & Performance for version number below 6.1Check Version:
wp plugin get penci-shortcodes-performance --field=versionVerify Fix Applied:
Confirm plugin version is 6.1 or higher in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests containing script tags to plugin endpoints
- Multiple failed XSS attempts in web server logs
Network Indicators:
- Suspicious JavaScript payloads in HTTP requests
- Unexpected external script loads from plugin pages
SIEM Query:
source="web_logs" AND ("penci-shortcodes" OR "penci-performance") AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")