CVE-2024-9687
📋 TL;DR
The WP 2FA with Telegram plugin for WordPress has an authentication bypass vulnerability that allows authenticated attackers with subscriber-level permissions or higher to log in as any user, including administrators. This occurs due to insufficient validation of user-controlled keys in the 'validate_tg' action. All WordPress sites using vulnerable plugin versions are affected.
💻 Affected Systems
- WP 2FA with Telegram WordPress plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain administrative access, leading to complete site compromise, data theft, malware injection, or site defacement.
Likely Case
Attackers escalate privileges to administrator accounts, potentially modifying content, stealing sensitive data, or installing backdoors.
If Mitigated
With proper access controls and monitoring, impact is limited to unauthorized access attempts that can be detected and blocked.
🎯 Exploit Status
Exploitation requires authenticated access but is straightforward once obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.0.1 or later
Vendor Advisory: https://plugins.trac.wordpress.org/browser/two-factor-login-telegram/tags/3.0.1
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'WP 2FA with Telegram' and update to version 3.0.1 or later. 4. Verify update completes successfully.
🔧 Temporary Workarounds
Disable plugin temporarily
allDeactivate the vulnerable plugin until patched.
wp plugin deactivate two-factor-login-telegram
🧯 If You Can't Patch
- Restrict user registration and review existing subscriber accounts for suspicious activity.
- Implement additional authentication layers like IP whitelisting or web application firewall rules.
🔍 How to Verify
Check if Vulnerable:
Check plugin version in WordPress admin under Plugins > Installed Plugins. If version is 3.0 or earlier, it's vulnerable.Check Version:
wp plugin get two-factor-login-telegram --field=versionVerify Fix Applied:
Confirm plugin version is 3.0.1 or later after update.📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts followed by successful logins from same IP, unusual user agent strings, or login events from unexpected locations.
Network Indicators:
- Unusual HTTP POST requests to wp-admin/admin-ajax.php with 'action=validate_tg' parameter.
SIEM Query:
source="wordpress.log" AND ("validate_tg" OR "two-factor-login-telegram")