CVE-2025-30893
📋 TL;DR
This DOM-based Cross-Site Scripting (XSS) vulnerability in the LeadConnector WordPress plugin allows attackers to inject malicious scripts into web pages viewed by other users. It affects all WordPress sites using LeadConnector plugin versions up to 3.0.2. Successful exploitation could lead to session hijacking, credential theft, or website defacement.
💻 Affected Systems
- LeadConnector 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 session cookies, take over WordPress sites, install backdoors, or redirect visitors to malicious sites, potentially compromising all site data and user information.
Likely Case
Attackers inject malicious JavaScript to steal user session cookies or credentials, perform actions on behalf of authenticated users, or deface website content.
If Mitigated
With proper input validation and output encoding, malicious scripts are neutralized before execution, preventing any client-side code injection.
🎯 Exploit Status
DOM-based XSS typically requires user interaction (clicking a malicious link) but can be exploited without authentication. Exploitation complexity is low as it involves standard XSS techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.0.3 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find LeadConnector plugin. 4. Click 'Update Now' if update available. 5. If no update appears, manually download version 3.0.3+ from WordPress.org and replace plugin files.
🔧 Temporary Workarounds
Disable LeadConnector Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate leadconnector
Implement Content Security Policy
allAdd CSP headers to restrict script execution sources
Add to .htaccess: Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
Add to nginx config: add_header Content-Security-Policy "default-src 'self'; script-src 'self'";
🧯 If You Can't Patch
- Implement a Web Application Firewall (WAF) with XSS protection rules to filter malicious input
- Enable WordPress security plugins that provide XSS protection and input sanitization features
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for LeadConnector version. If version is 3.0.2 or earlier, you are vulnerable.Check Version:
wp plugin get leadconnector --field=versionVerify Fix Applied:
After updating, verify LeadConnector plugin version shows 3.0.3 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual JavaScript payloads in URL parameters or form submissions
- Multiple requests with script tags or JavaScript events in query strings
- Unexpected iframe or script injections in page content
Network Indicators:
- HTTP requests containing suspicious script tags or JavaScript code in parameters
- Unusual redirects to external domains from LeadConnector pages
SIEM Query:
source="*access.log*" AND ("<script" OR "javascript:" OR "onload=" OR "onerror=") AND uri_path="*leadconnector*"