CVE-2023-46203
📋 TL;DR
This CVE describes a Missing Authorization vulnerability in the Just Custom Fields WordPress plugin that allows attackers to exploit incorrectly configured access control security levels. It affects all versions up to 3.3.2, potentially allowing unauthorized users to access functionality intended only for administrators or authenticated users.
💻 Affected Systems
- Just Custom Fields 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
Unauthenticated attackers could modify custom field configurations, inject malicious content, or access sensitive data through the plugin's administrative functions.
Likely Case
Attackers with basic WordPress user accounts could escalate privileges or modify site content beyond their intended permissions.
If Mitigated
With proper access controls and authentication checks, only authorized administrators can access plugin configuration functions.
🎯 Exploit Status
Exploitation requires some level of WordPress user access, but the vulnerability makes privilege escalation or unauthorized actions possible.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after 3.3.2
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Just Custom Fields and update to latest version. 4. Alternatively, download latest version from WordPress plugin repository and replace existing files.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable the Just Custom Fields plugin until patched
wp plugin deactivate just-custom-fields
Restrict Access
allUse WordPress roles and capabilities to restrict access to plugin functions
🧯 If You Can't Patch
- Implement strict role-based access controls in WordPress
- Monitor and audit user activity related to custom field modifications
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Installed Plugins for Just Custom Fields version 3.3.2 or earlierCheck Version:
wp plugin get just-custom-fields --field=versionVerify Fix Applied:
Verify plugin version is higher than 3.3.2 in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to custom field configuration pages
- User role changes or privilege escalation attempts
Network Indicators:
- HTTP requests to plugin admin endpoints from non-admin users
SIEM Query:
source="wordpress.log" AND ("just-custom-fields" OR "jcf") AND ("admin" OR "config" OR "settings") AND user_role!="administrator"