CVE-2025-63072
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in THEMECO Cornerstone WordPress plugin allows attackers to inject malicious scripts into web pages that are then executed when other users view those pages. All WordPress sites using Cornerstone plugin versions up to and including 7.7.3 are affected. The vulnerability occurs due to improper input sanitization during web page generation.
💻 Affected Systems
- THEMECO Cornerstone 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, perform actions as authenticated users, deface websites, or redirect users to malicious sites, potentially leading to complete site compromise.
Likely Case
Attackers inject malicious JavaScript that steals user session cookies or credentials when users visit compromised pages, leading to account takeover.
If Mitigated
With proper content security policies and input validation, the impact is limited to potential data leakage from the affected page only.
🎯 Exploit Status
Stored XSS vulnerabilities are commonly exploited. While no public PoC is confirmed, the vulnerability type suggests exploitation is straightforward for attackers with basic web security knowledge.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: >7.7.3
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Cornerstone plugin. 4. Click 'Update Now' if update is available. 5. Alternatively, download latest version from WordPress repository and manually update.
🔧 Temporary Workarounds
Temporary plugin deactivation
allDisable Cornerstone plugin until patch can be applied
wp plugin deactivate cornerstone
Content Security Policy implementation
allAdd CSP headers to restrict script execution sources
Add to .htaccess: Header set Content-Security-Policy "script-src 'self'"
Add to nginx config: add_header Content-Security-Policy "script-src 'self'";
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block XSS payloads
- Restrict user input fields and implement output encoding on all user-controlled data
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for Cornerstone version. If version is 7.7.3 or lower, system is vulnerable.Check Version:
wp plugin get cornerstone --field=versionVerify Fix Applied:
Verify Cornerstone plugin version is greater than 7.7.3 in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to Cornerstone endpoints with script tags
- Multiple failed login attempts following page views
Network Indicators:
- Outbound connections to suspicious domains after page loads
- Unexpected JavaScript execution in browser developer tools
SIEM Query:
source="wordpress" AND (uri="*cornerstone*" AND (body="*<script>*" OR body="*javascript:*"))