CVE-2025-11238
📋 TL;DR
The Watu Quiz WordPress plugin versions ≤3.4.4 have a stored XSS vulnerability when the 'Save source URL' option is enabled. Unauthenticated attackers can inject malicious scripts via HTTP Referer headers, which execute when users view compromised quiz pages. This affects all WordPress sites using vulnerable plugin versions with the vulnerable feature enabled.
💻 Affected Systems
- Watu Quiz 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 admin credentials, deface websites, redirect users to malicious sites, or install backdoors for persistent access.
Likely Case
Attackers inject malicious scripts to steal user session cookies, redirect users to phishing pages, or display unwanted content.
If Mitigated
With proper input validation and output escaping, the vulnerability would be prevented entirely.
🎯 Exploit Status
Exploitation requires the vulnerable feature to be enabled and involves simple HTTP header manipulation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.4.5
Vendor Advisory: https://plugins.trac.wordpress.org/changeset/3373855/watu
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Watu Quiz and click 'Update Now'. 4. Verify version is 3.4.5 or higher.
🔧 Temporary Workarounds
Disable Save Source URL Feature
allTurn off the vulnerable feature in plugin settings
Web Application Firewall Rule
allBlock or sanitize Referer headers containing script tags
🧯 If You Can't Patch
- Disable the Watu Quiz plugin entirely
- Implement strict Content Security Policy headers to mitigate XSS impact
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Watu Quiz version. If ≤3.4.4 and 'Save source URL' is enabled, you're vulnerable.Check Version:
wp plugin list --name=watu --field=versionVerify Fix Applied:
Confirm plugin version is ≥3.4.5 and test that Referer header input is properly sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual Referer headers containing script tags or JavaScript code
- Multiple failed quiz submissions with suspicious Referers
Network Indicators:
- HTTP requests with malicious scripts in Referer headers
- Outbound connections to suspicious domains after quiz submissions
SIEM Query:
source="web_logs" AND (Referer="*<script>*" OR Referer="*javascript:*")