CVE-2025-48096
📋 TL;DR
This CVE describes a missing authorization vulnerability in the FRESHFACE Custom CSS WordPress plugin that allows attackers to bypass access controls. Attackers can exploit incorrectly configured security levels to modify CSS settings without proper permissions. This affects all WordPress sites using Custom CSS plugin versions up to and including 1.4.0.
💻 Affected Systems
- FRESHFACE Custom CSS (custom-css-editor) 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 inject malicious CSS that enables cross-site scripting (XSS), deface websites, or create phishing pages by modifying site appearance without authorization.
Likely Case
Unauthorized users modify CSS settings to alter website appearance, potentially disrupting functionality or creating misleading content.
If Mitigated
With proper access controls, only authorized administrators can modify CSS settings, preventing unauthorized changes.
🎯 Exploit Status
Exploitation requires some WordPress knowledge but no authentication. Attackers need to understand WordPress plugin structure and access control mechanisms.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 1.4.0
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'Custom CSS' plugin. 4. Click 'Update Now' if update available. 5. If no update, deactivate and remove plugin, then install latest version from WordPress repository.
🔧 Temporary Workarounds
Temporary Access Restriction
allRestrict access to WordPress admin panel and plugin settings using IP whitelisting or additional authentication layers.
🧯 If You Can't Patch
- Disable or remove the Custom CSS plugin entirely from WordPress installation.
- Implement web application firewall (WAF) rules to block unauthorized access to plugin endpoints.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for 'Custom CSS' version. If version is 1.4.0 or lower, system is vulnerable.Check Version:
wp plugin list --name=custom-css-editor --field=versionVerify Fix Applied:
After update, verify plugin version is higher than 1.4.0 in WordPress plugins list. Test access controls by attempting unauthorized CSS modifications.📡 Detection & Monitoring
Log Indicators:
- Unauthorized POST requests to /wp-admin/admin-ajax.php with custom-css-editor actions
- Multiple failed authorization attempts followed by successful CSS modification requests
Network Indicators:
- Unusual traffic patterns to WordPress admin endpoints from unauthorized IP addresses
SIEM Query:
source="wordpress.log" AND (uri_path="/wp-admin/admin-ajax.php" AND action="custom_css_editor_*") AND user_role!="administrator"