CVE-2024-37277
📋 TL;DR
This CVE describes an Insecure Direct Object Reference (IDOR) vulnerability in the Paid Memberships Pro WordPress plugin. Attackers can manipulate user-controlled keys to bypass authorization checks and access functionality intended only for privileged users. All WordPress sites using Paid Memberships Pro versions up to 3.0.4 are affected.
💻 Affected Systems
- Paid Memberships Pro WordPress Plugin
📦 What is this software?
Paid Memberships Pro by Strangerstudios
⚠️ Risk & Real-World Impact
Worst Case
Attackers could access administrative functions, modify membership levels, view sensitive user data, or manipulate payment information without proper authorization.
Likely Case
Unauthorized users accessing premium content or features meant for paid members, potentially leading to revenue loss and data exposure.
If Mitigated
With proper access controls and input validation, exploitation would be prevented, maintaining proper authorization boundaries.
🎯 Exploit Status
Exploitation requires some user access but minimal technical skill. The vulnerability is well-documented and similar IDOR exploits are commonly weaponized.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.0.5 or later
Vendor Advisory: https://www.paidmembershipspro.com/
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Paid Memberships Pro. 4. Click 'Update Now' if available. 5. Alternatively, download version 3.0.5+ from WordPress.org and manually update.
🔧 Temporary Workarounds
Temporary Plugin Deactivation
allDisable the plugin until patching is possible
wp plugin deactivate paid-memberships-pro
Web Application Firewall Rules
allImplement WAF rules to detect and block IDOR patterns
🧯 If You Can't Patch
- Implement additional server-side authorization checks for all user-controlled parameters
- Restrict plugin access to trusted IP addresses only using .htaccess or web server configuration
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins → Paid Memberships Pro version numberCheck Version:
wp plugin get paid-memberships-pro --field=versionVerify Fix Applied:
Verify plugin version is 3.0.5 or higher after update📡 Detection & Monitoring
Log Indicators:
- Unusual access patterns to membership endpoints
- Multiple failed authorization attempts followed by successful access
- User IDs accessing resources outside their membership level
Network Indicators:
- HTTP requests with manipulated object IDs or parameters
- Requests to admin functions from non-admin users
SIEM Query:
source="wordpress" AND (uri_path="/wp-admin/admin-ajax.php" OR uri_path CONTAINS "pmpro") AND (http_method="POST" OR http_method="GET") AND (query_string CONTAINS "action=" OR query_string CONTAINS "user_id=")