CVE-2021-24501
📋 TL;DR
This vulnerability in the Workreap WordPress theme allows authenticated users to modify or delete objects belonging to other users due to missing authorization checks in AJAX actions. It affects WordPress sites using Workreap theme versions before 2.2.2. Any site with user accounts is vulnerable to privilege escalation and data manipulation.
💻 Affected Systems
- Workreap WordPress Theme
📦 What is this software?
Workreap by Amentotech
⚠️ Risk & Real-World Impact
Worst Case
Malicious authenticated users could delete or modify critical site content, user profiles, or business data, potentially causing complete site compromise or data loss.
Likely Case
Authenticated users exploiting the vulnerability to tamper with other users' content, profiles, or site objects, leading to data integrity issues and unauthorized changes.
If Mitigated
With proper authorization controls, only authorized users can perform operations on objects they own, preventing unauthorized modifications.
🎯 Exploit Status
Exploitation requires authenticated access but is straightforward once logged in. Public proof-of-concept code exists.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.2.2
Vendor Advisory: https://jetpack.com/2021/07/07/multiple-vulnerabilities-in-workreap-theme/
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Appearance > Themes. 3. Check if Workreap theme is installed. 4. If version is below 2.2.2, update to 2.2.2 or later. 5. If auto-update is unavailable, manually download and install the patched version.
🔧 Temporary Workarounds
Disable vulnerable AJAX endpoints
allTemporarily disable the vulnerable AJAX actions by modifying theme functions or using security plugins to block unauthorized access.
Add to theme's functions.php: remove_action('wp_ajax_nopriv_vulnerable_action', 'callback'); remove_action('wp_ajax_vulnerable_action', 'callback');
Implement custom authorization checks
allAdd authorization verification to AJAX callbacks to ensure users can only modify their own objects.
Modify theme AJAX handlers to include: if (!current_user_can('edit_post', $object_id) || get_current_user_id() != get_post_field('post_author', $object_id)) { wp_die('Unauthorized'); }
🧯 If You Can't Patch
- Restrict user registration and limit authenticated user access to trusted individuals only.
- Implement web application firewall (WAF) rules to block suspicious AJAX requests targeting object modification endpoints.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Appearance > Themes > Workreap details for version number. If version is below 2.2.2, the site is vulnerable.Check Version:
wp theme list --field=name,version | grep -i workreapVerify Fix Applied:
Confirm Workreap theme version is 2.2.2 or higher in WordPress admin. Test authenticated user permissions to ensure they cannot modify other users' objects.📡 Detection & Monitoring
Log Indicators:
- Unusual AJAX POST requests to admin-ajax.php with action parameters like 'workreap_*' from non-admin users
- Multiple object modification or deletion events from single user accounts in short timeframes
Network Indicators:
- HTTP POST requests to /wp-admin/admin-ajax.php with action parameters targeting object operations
- Unusual spike in AJAX requests from authenticated user sessions
SIEM Query:
source="wordpress.log" AND ("admin-ajax.php" AND "action=workreap_" AND ("delete" OR "update" OR "modify"))