CVE-2025-15027
📋 TL;DR
The JAY Login & Register WordPress plugin allows unauthenticated attackers to update arbitrary user metadata through a vulnerable AJAX function, enabling privilege escalation to administrator level. This affects all WordPress sites using this plugin up to version 2.6.03. Attackers can gain full control of vulnerable WordPress installations.
💻 Affected Systems
- WordPress JAY Login & Register 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
Complete compromise of WordPress site with attacker gaining administrator privileges, installing backdoors, defacing site, stealing data, and using site for further attacks.
Likely Case
Attackers gain administrator access, install malicious plugins/themes, create hidden admin accounts, and potentially compromise the entire server if WordPress has high privileges.
If Mitigated
Attack detected and blocked before privilege escalation completes, limiting impact to failed login attempts.
🎯 Exploit Status
Simple HTTP POST request to vulnerable AJAX endpoint with crafted parameters.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.6.04 or later
Restart Required: No
Instructions:
1. Update plugin to version 2.6.04+ via WordPress admin panel. 2. Verify update completed successfully. 3. Test login/register functionality.
🔧 Temporary Workarounds
Disable vulnerable AJAX endpoint
allBlock access to the vulnerable jay_login_register_ajax_create_final_user function
Add to theme's functions.php: remove_action('wp_ajax_nopriv_jay_login_register_ajax_create_final_user', 'jay_login_register_ajax_create_final_user');
Temporary plugin deactivation
linuxDisable JAY Login & Register plugin until patched
wp plugin deactivate jay-login-register
🧯 If You Can't Patch
- Remove JAY Login & Register plugin completely and use alternative authentication solution
- Implement web application firewall rules to block requests to /wp-admin/admin-ajax.php with jay_login_register parameters
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > JAY Login & Register version. If version ≤ 2.6.03, vulnerable.Check Version:
wp plugin get jay-login-register --field=versionVerify Fix Applied:
Verify plugin version is 2.6.04+ and test that user role changes via AJAX are properly restricted.📡 Detection & Monitoring
Log Indicators:
- POST requests to /wp-admin/admin-ajax.php with action=jay_login_register_ajax_create_final_user
- Multiple user role change events in short timeframe
- New administrator accounts created from unusual IPs
Network Indicators:
- HTTP POST to admin-ajax.php with role parameter set to administrator
- Unusual spikes in AJAX requests to WordPress backend
SIEM Query:
source="wordpress.log" AND "admin-ajax.php" AND "jay_login_register" AND ("role" OR "administrator")