CVE-2025-49401
📋 TL;DR
This vulnerability allows attackers to inject malicious objects through deserialization of untrusted data in the Quiz And Survey Master WordPress plugin. Successful exploitation could lead to remote code execution or data manipulation. All WordPress sites using affected versions of this plugin are vulnerable.
💻 Affected Systems
- Quiz And Survey Master 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
Remote code execution leading to complete system compromise, data theft, or ransomware deployment.
Likely Case
Arbitrary code execution allowing attackers to create backdoors, steal sensitive data, or deface websites.
If Mitigated
Limited impact if proper input validation and output encoding are implemented, though object injection could still occur.
🎯 Exploit Status
Deserialization vulnerabilities are frequently weaponized and public exploit code is available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 10.2.6 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'Quiz And Survey Master'. 4. Click 'Update Now' if available. 5. Alternatively, download version 10.2.6+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable the vulnerable plugin until patched.
wp plugin deactivate quiz-master-next
WAF Rule
allImplement web application firewall rules to block deserialization attempts.
🧯 If You Can't Patch
- Remove the plugin entirely if not essential
- Implement strict input validation and sanitization in custom code
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Quiz And Survey Master version number.Check Version:
wp plugin get quiz-master-next --field=versionVerify Fix Applied:
Verify plugin version is 10.2.6 or higher in WordPress admin.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to quiz/survey endpoints
- PHP object injection patterns in logs
- Unexpected file creation/modification
Network Indicators:
- HTTP requests with serialized data payloads
- Traffic to known exploit URLs
SIEM Query:
source="web_logs" AND (uri="*quiz-master*" OR uri="*qsm*" OR uri="*quiz_and_survey*") AND (method="POST" OR method="PUT") AND (payload="*O:*" OR payload="*C:*" OR payload="*serialize*" OR payload="*unserialize*")