CVE-2025-30963
📋 TL;DR
This DOM-based cross-site scripting vulnerability in Crocoblock's JetSmartFilters WordPress plugin allows attackers to inject malicious scripts that execute in users' browsers when they visit compromised pages. The vulnerability affects all versions up to 3.6.3 of the plugin. WordPress sites using vulnerable versions of JetSmartFilters are at risk.
💻 Affected Systems
- Crocoblock JetSmartFilters 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, perform actions as authenticated users, deface websites, or redirect users to malicious sites, potentially leading to complete site compromise.
Likely Case
Attackers inject malicious scripts to steal user session cookies or credentials, perform unauthorized actions, or redirect users to phishing pages.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before reaching users' browsers, preventing exploitation.
🎯 Exploit Status
DOM-based XSS typically requires user interaction but can be exploited through crafted links or forms. No authentication required for exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.6.4 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find JetSmartFilters and click 'Update Now'. 4. Verify update to version 3.6.4 or later.
🔧 Temporary Workarounds
Disable JetSmartFilters Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate jet-smart-filters
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 web application firewall (WAF) rules to block XSS payloads
- Disable user input fields that trigger the vulnerable DOM manipulation
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > JetSmartFilters version. If version is 3.6.3 or earlier, system is vulnerable.Check Version:
wp plugin get jet-smart-filters --field=versionVerify Fix Applied:
Verify JetSmartFilters plugin version is 3.6.4 or later in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual JavaScript payloads in URL parameters
- Multiple failed XSS attempts in web server logs
- Suspicious user-agent strings containing script tags
Network Indicators:
- HTTP requests with encoded script tags in parameters
- Unusual redirect patterns from the affected pages
SIEM Query:
source="web_server_logs" AND ("<script" OR "javascript:" OR "onload=" OR "onerror=") AND uri="*jetsmartfilters*"