CVE-2025-58031
📋 TL;DR
This stored cross-site scripting (XSS) vulnerability in Nextend Facebook Connect WordPress plugin allows attackers to inject malicious scripts into web pages. When users view compromised pages, the scripts execute in their browsers, potentially stealing credentials or session cookies. All WordPress sites using Nextend Facebook Connect versions up to 3.1.19 are affected.
💻 Affected Systems
- Nextend Facebook Connect 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 administrator credentials, hijack user sessions, deface websites, or redirect users to malicious sites, potentially leading to complete site compromise.
Likely Case
Attackers inject malicious JavaScript to steal user session cookies or credentials, enabling account takeover and unauthorized access to user data.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before reaching users, preventing exploitation.
🎯 Exploit Status
Exploitation requires the ability to inject malicious input into the vulnerable component, which typically requires some level of access or user interaction.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 3.1.19
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Nextend Facebook Connect. 4. Click 'Update Now' if available. 5. Alternatively, download latest version from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable Plugin
WordPressTemporarily disable the vulnerable plugin until patched.
wp plugin deactivate nextend-facebook-connect
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution
- Use web application firewall (WAF) rules to block XSS payloads
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for Nextend Facebook Connect version 3.1.19 or earlier.Check Version:
wp plugin get nextend-facebook-connect --field=versionVerify Fix Applied:
Verify plugin version is higher than 3.1.19 in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests containing script tags or JavaScript code to plugin endpoints
- Multiple failed login attempts following suspicious plugin activity
Network Indicators:
- HTTP requests containing malicious script payloads in parameters
- Unexpected outbound connections to external domains from user browsers
SIEM Query:
source="wordpress.log" AND "nextend-facebook-connect" AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")