CVE-2025-23707
📋 TL;DR
This vulnerability allows attackers to inject malicious scripts into web pages generated by the Matamko En Masse WordPress plugin. When users visit a specially crafted URL, the script executes in their browser, potentially stealing credentials or performing actions on their behalf. All WordPress sites using En Masse plugin versions up to 1.0 are affected.
💻 Affected Systems
- Matamko En Masse 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 session cookies, take over WordPress sites, deface websites, or redirect users to malicious sites.
Likely Case
Attackers steal user session cookies, perform phishing attacks, or redirect users to malicious content.
If Mitigated
Limited impact with proper input validation and output encoding; script execution may be blocked by modern browser security features.
🎯 Exploit Status
Reflected XSS vulnerabilities are commonly exploited and require minimal technical skill.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.1 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'En Masse' plugin. 4. Click 'Update Now' if update available. 5. If no update available, deactivate and remove plugin, then install latest version from WordPress repository.
🔧 Temporary Workarounds
Web Application Firewall (WAF)
allDeploy a WAF with XSS protection rules to block malicious requests.
Content Security Policy (CSP)
allImplement CSP headers to restrict script execution sources.
Header set Content-Security-Policy "default-src 'self'; script-src 'self'" in .htaccess or web server config
🧯 If You Can't Patch
- Disable or remove the En Masse plugin immediately
- Implement strict input validation and output encoding in custom code
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for En Masse version. If version is 1.0 or earlier, you are vulnerable.Check Version:
wp plugin list --name=en-masse-wp --field=version (if WP-CLI installed)Verify Fix Applied:
After updating, verify plugin version shows 1.0.1 or later in WordPress plugins list.📡 Detection & Monitoring
Log Indicators:
- Unusual GET/POST requests with script tags or JavaScript in parameters
- Multiple 404 errors for similar malicious URLs
Network Indicators:
- HTTP requests containing <script>, javascript:, or encoded script payloads in query parameters
SIEM Query:
source="web_server_logs" AND (uri="*<script>*" OR uri="*javascript:*" OR uri="*%3Cscript%3E*")