CVE-2020-36832
📋 TL;DR
The Ultimate Membership Pro WordPress plugin has an authentication bypass vulnerability that allows unauthenticated attackers to log in as any user, including administrators. This affects WordPress sites using plugin versions 7.3 through 8.6. Attackers can compromise the entire site by gaining administrative access.
💻 Affected Systems
- Ultimate Membership Pro WordPress 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 site takeover with administrative access, data theft, malware installation, defacement, and potential server compromise.
Likely Case
Administrative account compromise leading to content manipulation, plugin/theme installation, user data exposure, and SEO spam injection.
If Mitigated
Limited impact if strong network controls, web application firewalls, and monitoring detect and block exploitation attempts.
🎯 Exploit Status
Simple HTTP requests can trigger the vulnerability; multiple security vendors have confirmed active exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.7 or later
Vendor Advisory: https://codecanyon.net/item/ultimate-membership-pro-wordpress-plugin/12159253
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Ultimate Membership Pro. 4. Click 'Update Now' if available. 5. If manual update needed, download version 8.7+ from CodeCanyon and replace plugin files via FTP/SFTP.
🔧 Temporary Workarounds
Temporary Plugin Deactivation
allDisable the vulnerable plugin until patching is possible
wp plugin deactivate ultimate-membership-pro
Web Application Firewall Rule
allBlock requests to vulnerable plugin endpoints
Add WAF rule to block requests containing 'ihc_do_login' or 'ihc_action' parameters
🧯 If You Can't Patch
- Remove the plugin completely and use alternative membership solutions
- Implement IP whitelisting for WordPress admin area and restrict access to trusted networks only
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins → Ultimate Membership Pro version numberCheck Version:
wp plugin list --name='ultimate-membership-pro' --field=versionVerify Fix Applied:
Confirm plugin version is 8.7 or higher in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual login events for user ID 1 from unfamiliar IPs
- POST requests to /wp-admin/admin-ajax.php with ihc_do_login parameter
- Multiple failed login attempts followed by successful admin login
Network Indicators:
- HTTP POST requests containing 'action=ihc_do_login' or 'ihc_action' parameters
- Unusual traffic patterns to WordPress login endpoints
SIEM Query:
source="wordpress.log" AND ("ihc_do_login" OR "ihc_action") AND status=200