CVE-2023-40608
📋 TL;DR
This vulnerability allows unauthenticated attackers to bypass authorization controls in the Paid Memberships Pro CCBill Gateway WordPress plugin. Attackers can perform actions that should require authentication, potentially accessing or modifying membership data. All WordPress sites using this plugin version 0.3 or earlier are affected.
💻 Affected Systems
- Paid Memberships Pro CCBill Gateway 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
Attackers could modify membership levels, grant unauthorized access to premium content, manipulate payment data, or compromise the entire membership system.
Likely Case
Unauthorized users gain access to premium content or features without paying, leading to revenue loss and potential data exposure.
If Mitigated
With proper network segmentation and monitoring, impact is limited to the affected plugin functionality with early detection of unauthorized access attempts.
🎯 Exploit Status
The vulnerability is in authorization logic, making exploitation straightforward once the attack vector is identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.4 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'Paid Memberships Pro CCBill Gateway'. 4. Click 'Update Now' if available. 5. If no update appears, manually download version 0.4+ from WordPress.org and replace the plugin files.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate pmpro-ccbill
Web Application Firewall Rule
allBlock requests to vulnerable plugin endpoints
# Add WAF rule to block /wp-content/plugins/pmpro-ccbill/ requests from unauthenticated users
🧯 If You Can't Patch
- Implement strict network access controls to limit plugin exposure
- Enable detailed logging and monitoring for unauthorized access attempts to plugin endpoints
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin > Plugins > Installed Plugins for 'Paid Memberships Pro CCBill Gateway' version 0.3 or earlierCheck Version:
wp plugin get pmpro-ccbill --field=versionVerify Fix Applied:
Verify plugin version is 0.4 or later in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unauthenticated requests to /wp-content/plugins/pmpro-ccbill/ endpoints
- Unexpected membership level changes
- Failed authorization checks in plugin logs
Network Indicators:
- Unusual traffic patterns to plugin-specific endpoints from unauthenticated sources
SIEM Query:
source="wordpress.log" AND "pmpro-ccbill" AND (status=200 OR status=302) AND user="-"🔗 References
- https://patchstack.com/database/vulnerability/pmpro-ccbill/wordpress-paid-memberships-pro-ccbill-gateway-plugin-0-3-unauthenticated-broken-access-control-vulnerability?_s_id=cve
- https://patchstack.com/database/vulnerability/pmpro-ccbill/wordpress-paid-memberships-pro-ccbill-gateway-plugin-0-3-unauthenticated-broken-access-control-vulnerability?_s_id=cve
