CVE-2023-2736
📋 TL;DR
This CSRF vulnerability in the Groundhogg WordPress plugin allows authenticated attackers to trick administrators into performing actions that modify auto-login links. Attackers can then elevate privileges by changing the assigned user for these links. WordPress sites using Groundhogg versions up to 2.7.9.8 are affected.
💻 Affected Systems
- Groundhogg WordPress Plugin
📦 What is this software?
Groundhogg by Groundhogg
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain administrative privileges on the WordPress site, leading to complete compromise including data theft, defacement, or malware installation.
Likely Case
Attackers elevate their privileges to verified user status, gaining access to restricted areas and sensitive contact data managed by the plugin.
If Mitigated
With proper CSRF protections and user awareness, exploitation attempts fail, maintaining normal plugin functionality.
🎯 Exploit Status
Exploitation requires social engineering to trick administrators and authenticated attacker access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.7.10
Vendor Advisory: https://plugins.trac.wordpress.org/changeset/2914493/groundhogg/tags/2.7.10/admin/contacts/contacts-page.php
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Groundhogg and click 'Update Now'. 4. Verify version is 2.7.10 or higher.
🔧 Temporary Workarounds
Disable Groundhogg Plugin
allTemporarily disable the vulnerable plugin until patching is possible.
wp plugin deactivate groundhogg
Add CSRF Protection Manually
allAdd nonce validation to the ajax_edit_contact function if you cannot update immediately.
🧯 If You Can't Patch
- Implement strict user privilege separation and limit administrator access.
- Deploy web application firewall rules to detect and block CSRF attempts.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Groundhogg version. If version is 2.7.9.8 or lower, you are vulnerable.Check Version:
wp plugin get groundhogg --field=versionVerify Fix Applied:
After updating, confirm Groundhogg version is 2.7.10 or higher in WordPress plugins list.📡 Detection & Monitoring
Log Indicators:
- Unusual ajax_edit_contact requests from non-admin users
- Multiple failed privilege escalation attempts in WordPress logs
Network Indicators:
- Suspicious POST requests to admin-ajax.php with contact modification parameters
SIEM Query:
source="wordpress.log" AND "ajax_edit_contact" AND NOT user="admin"🔗 References
- https://plugins.trac.wordpress.org/browser/groundhogg/tags/2.7.9.8/admin/contacts/contacts-page.php#L542
- https://plugins.trac.wordpress.org/browser/groundhogg/tags/2.7.9.8/includes/shortcodes.php#L99
- https://plugins.trac.wordpress.org/changeset/2914493/groundhogg/tags/2.7.10/admin/contacts/contacts-page.php
- https://www.wordfence.com/threat-intel/vulnerabilities/id/9bf472f1-5980-48ee-aa10-aad19b6f2456?source=cve
- https://plugins.trac.wordpress.org/browser/groundhogg/tags/2.7.9.8/admin/contacts/contacts-page.php#L542
- https://plugins.trac.wordpress.org/browser/groundhogg/tags/2.7.9.8/includes/shortcodes.php#L99
- https://plugins.trac.wordpress.org/changeset/2914493/groundhogg/tags/2.7.10/admin/contacts/contacts-page.php
- https://www.wordfence.com/threat-intel/vulnerabilities/id/9bf472f1-5980-48ee-aa10-aad19b6f2456?source=cve
