CVE-2025-39367
📋 TL;DR
This CVE describes a Missing Authorization vulnerability in the Kleo WordPress theme that allows unauthorized users to access functionality intended only for authenticated users. It affects all Kleo theme installations before version 5.4.4. WordPress site administrators using vulnerable Kleo theme versions are affected.
💻 Affected Systems
- SeventhQueen Kleo WordPress Theme
⚠️ 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 gain administrative privileges, modify site content, install malicious plugins/themes, or access sensitive user data.
Likely Case
Unauthorized users accessing restricted functionality like theme settings, user data, or content management features.
If Mitigated
Minimal impact with proper access controls and monitoring in place.
🎯 Exploit Status
Missing authorization vulnerabilities typically require minimal technical skill to exploit once the vulnerable endpoint is identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.4.4
Vendor Advisory: https://patchstack.com/database/wordpress/theme/kleo/vulnerability/wordpress-kleo-theme-5-4-4-broken-access-control-vulnerability?_s_id=cve
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Appearance > Themes. 3. Find Kleo theme and click 'Update Now' if available. 4. If manual update needed, download Kleo 5.4.4 from WordPress.org or vendor. 5. Upload and replace existing theme files via FTP or file manager. 6. Clear any caching plugins.
🔧 Temporary Workarounds
Disable Kleo Theme
allSwitch to a different WordPress theme temporarily until patched
Restrict Admin Access
linuxLimit WordPress admin access to specific IP addresses using .htaccess or web server configuration
# In .htaccess for WordPress admin
Order Deny,Allow
Deny from all
Allow from 192.168.1.100
Allow from 10.0.0.0/8
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block unauthorized access attempts to Kleo theme endpoints
- Enable detailed logging and monitoring for unauthorized access attempts to WordPress admin functions
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Appearance > Themes. If Kleo theme version is below 5.4.4, the system is vulnerable.Check Version:
Check WordPress admin panel or examine style.css in wp-content/themes/kleo/ for Version: informationVerify Fix Applied:
After updating, verify Kleo theme version shows 5.4.4 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual access patterns to WordPress admin-ajax.php or theme-specific endpoints
- 401/403 errors followed by successful 200 responses to restricted endpoints
- User agent anomalies accessing theme administration functions
Network Indicators:
- HTTP requests to Kleo-specific endpoints from unauthorized IP addresses
- POST requests to theme update/configuration endpoints without proper authentication
SIEM Query:
source="wordpress.log" AND (uri_path="*/kleo/*" OR uri_path="*/admin-ajax.php") AND response_code=200 AND (user="-" OR user="unauthenticated")