CVE-2025-14540
📋 TL;DR
The Userback WordPress plugin has an authorization vulnerability that allows authenticated users with Subscriber-level access or higher to access sensitive configuration data and private content. This affects all WordPress sites using Userback plugin versions up to 1.0.15. Attackers can extract API tokens and view draft/private posts they shouldn't have access to.
💻 Affected Systems
- Userback 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 obtain Userback API access tokens, potentially compromising connected Userback accounts and exposing all plugin configuration data. Private/draft content could be exfiltrated and published.
Likely Case
Low-privilege users access private posts and pages they shouldn't see, potentially exposing sensitive internal content. API tokens could be stolen for further attacks.
If Mitigated
With proper access controls and monitoring, impact is limited to unauthorized viewing of some content by authenticated users.
🎯 Exploit Status
Exploitation requires authenticated access (Subscriber role or higher). Simple HTTP request to vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.16 or later
Vendor Advisory: https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3200000%40userback&new=3200000%40userback
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Go to Plugins → Installed Plugins. 3. Find Userback plugin. 4. Click 'Update Now' if available. 5. Alternatively, download latest version from WordPress repository and replace plugin files.
🔧 Temporary Workarounds
Disable Userback Plugin
allTemporarily deactivate the vulnerable plugin until patched
wp plugin deactivate userback
Restrict User Registration
allPrevent new user accounts from being created to limit attack surface
Settings → General → Membership: Uncheck 'Anyone can register'
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block requests to /wp-admin/admin-ajax.php?action=userback_get_json
- Review and audit all user accounts, especially those with Subscriber role, and remove any suspicious accounts
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins → Userback version. If version is 1.0.15 or earlier, you are vulnerable.Check Version:
wp plugin get userback --field=versionVerify Fix Applied:
After updating, confirm Userback plugin version is 1.0.16 or later in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Multiple POST requests to /wp-admin/admin-ajax.php with action=userback_get_json from non-admin users
- Unusual access patterns from Subscriber-level accounts
Network Indicators:
- HTTP requests to vulnerable endpoint returning JSON with sensitive data
- Traffic to Userback API endpoints from unexpected sources
SIEM Query:
source="wordpress.log" AND uri="/wp-admin/admin-ajax.php" AND query="action=userback_get_json" AND user_role!="administrator"