CVE-2025-10658
📋 TL;DR
The SupportCandy WordPress plugin has an authentication bypass vulnerability that allows unauthenticated attackers to brute-force 6-digit OTP codes and gain unauthorized access to customer support tickets. This affects all WordPress sites using SupportCandy plugin versions up to and including 3.3.7.
💻 Affected Systems
- SupportCandy – Helpdesk & Customer Support Ticket System for WordPress
⚠️ 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 gain full access to all customer support tickets, potentially exposing sensitive customer data, personal information, and internal communications.
Likely Case
Unauthorized access to customer support tickets leading to data exposure and potential privilege escalation within the support system.
If Mitigated
Limited impact with proper rate limiting and monitoring in place, though authentication bypass remains possible.
🎯 Exploit Status
Exploitation requires brute-forcing a 6-digit OTP code, which is feasible due to missing rate limiting.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 3.3.8 or later
Vendor Advisory: https://plugins.trac.wordpress.org/changeset/3364335/
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find SupportCandy plugin. 4. Click 'Update Now' if available. 5. Alternatively, download version 3.3.8+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Implement Rate Limiting
allAdd rate limiting to OTP verification endpoints using web application firewall or server configuration.
Disable Guest Login
allTemporarily disable guest login functionality in SupportCandy settings until patched.
🧯 If You Can't Patch
- Implement network-level rate limiting for OTP verification requests
- Monitor logs for repeated OTP verification attempts and block suspicious IPs
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > SupportCandy version. If version is 3.3.7 or lower, you are vulnerable.Check Version:
wp plugin list --name=supportcandy --field=versionVerify Fix Applied:
Verify SupportCandy plugin version is 3.3.8 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Multiple failed OTP verification attempts from same IP
- Successful OTP verification without corresponding email send
Network Indicators:
- High volume of POST requests to OTP verification endpoints
- Requests to /wp-json/supportcandy/v2/otp/verify
SIEM Query:
source="web_logs" AND (uri_path="/wp-json/supportcandy/v2/otp/verify" OR uri_path LIKE "%/otp/verify%") AND status=200 | stats count by src_ip🔗 References
- https://plugins.trac.wordpress.org/browser/supportcandy/tags/3.3.7/includes/class-wpsc-current-user.php#L820
- https://plugins.trac.wordpress.org/browser/supportcandy/tags/3.3.7/includes/models/class-wpsc-email-otp.php#L348
- https://plugins.trac.wordpress.org/changeset/3364335/
- https://www.wordfence.com/threat-intel/vulnerabilities/id/2b11670a-f6e4-4555-ab76-4223f0194517?source=cve
