CVE-2024-10552
📋 TL;DR
This stored XSS vulnerability in the Flexmls IDX WordPress plugin allows authenticated attackers with Contributor access or higher to inject malicious scripts via API key/secret parameters. The scripts execute when users view compromised pages, potentially affecting all visitors. WordPress sites using vulnerable plugin versions are at risk.
💻 Affected Systems
- Flexmls IDX 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 steal admin credentials, deface websites, redirect users to malicious sites, or install backdoors for persistent access.
Likely Case
Attackers inject malicious scripts to steal user session cookies, perform phishing attacks, or modify page content.
If Mitigated
With proper input validation and output escaping, the attack surface is eliminated, though existing injections may persist until cleaned.
🎯 Exploit Status
Exploitation requires authenticated access but is technically simple once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.14.27 or later
Vendor Advisory: https://plugins.trac.wordpress.org/changeset/3226484/
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Flexmls IDX plugin. 4. Click 'Update Now' if available. 5. Alternatively, download latest version from WordPress repository and manually update.
🔧 Temporary Workarounds
Remove Contributor Access
allTemporarily restrict Contributor-level user roles to prevent exploitation.
Disable Plugin
allDeactivate the Flexmls IDX plugin until patched.
🧯 If You Can't Patch
- Implement strict input validation and output escaping in custom code
- Use web application firewall (WAF) rules to block XSS payloads
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Flexmls IDX > Version. If version is 3.14.26 or earlier, you are vulnerable.Check Version:
wp plugin list --name=flexmls-idx --field=versionVerify Fix Applied:
After updating, verify version is 3.14.27 or later. Test API key/secret fields for proper sanitization.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to admin-intro-api.php with script tags in parameters
- Multiple failed login attempts followed by API configuration changes
Network Indicators:
- Inbound requests containing <script> tags in API key/secret parameters
- Outbound connections to suspicious domains from WordPress pages
SIEM Query:
source="wordpress.log" AND ("admin-intro-api.php" AND ("api_key" OR "api_secret") AND ("<script>" OR "javascript:"))🔗 References
- https://plugins.trac.wordpress.org/browser/flexmls-idx/trunk/views/admin-intro-api.php#L22
- https://plugins.trac.wordpress.org/browser/flexmls-idx/trunk/views/admin-intro-api.php#L30
- https://plugins.trac.wordpress.org/changeset/3226484/
- https://www.wordfence.com/threat-intel/vulnerabilities/id/0624108b-cd60-4278-802d-d4853f73ec6a?source=cve
