CVE-2025-27319
📋 TL;DR
This vulnerability allows attackers to inject malicious scripts into web pages generated by the User List WordPress plugin. When a user visits a specially crafted URL, the script executes in their browser, potentially stealing cookies, session tokens, or performing actions on their behalf. All WordPress sites running User List plugin versions up to 1.5.1 are affected.
💻 Affected Systems
- WordPress User List 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, take over WordPress sites, deface websites, or redirect users to malicious sites.
Likely Case
Attackers steal user session cookies or credentials through phishing links, potentially compromising individual accounts.
If Mitigated
With proper input validation and output encoding, malicious scripts are neutralized before reaching users' browsers.
🎯 Exploit Status
Reflected XSS typically requires user interaction (clicking malicious link) but is trivial to exploit once the vulnerable parameter is identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.5.2 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'User List' plugin. 4. Click 'Update Now' if available. 5. If no update appears, download version 1.5.2+ from WordPress.org and manually update.
🔧 Temporary Workarounds
Disable User List Plugin
allTemporarily disable the vulnerable plugin until patched.
wp plugin deactivate user-list
Web Application Firewall Rule
allBlock requests containing XSS payloads targeting User List endpoints.
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution
- Use web application firewall to filter malicious input patterns
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > User List version. If version is 1.5.1 or earlier, you are vulnerable.Check Version:
wp plugin get user-list --field=versionVerify Fix Applied:
Verify plugin version is 1.5.2 or later in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual GET/POST requests to User List endpoints with script tags or JavaScript in parameters
- Multiple failed XSS attempts in web server logs
Network Indicators:
- HTTP requests containing <script>, javascript:, or encoded XSS payloads in query parameters
SIEM Query:
source="*access.log*" AND ("user-list" OR "wp-content/plugins/user-list") AND ("<script" OR "javascript:" OR "%3Cscript" OR "onerror=")