CVE-2025-13513
📋 TL;DR
The Clik stats WordPress plugin contains a reflected cross-site scripting (XSS) vulnerability that allows unauthenticated attackers to inject malicious scripts via crafted URLs. When users click malicious links, attackers can steal session cookies, redirect users, or perform actions on their behalf. All WordPress sites using Clik stats plugin versions 0.8 and earlier are affected.
💻 Affected Systems
- WordPress Clik stats 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 steal administrator session cookies, gain full administrative access to WordPress, install backdoors, deface websites, or exfiltrate sensitive data.
Likely Case
Attackers steal user session cookies, redirect users to phishing sites, or perform limited actions within the user's current session context.
If Mitigated
With proper web application firewalls and security headers, malicious payloads are blocked, limiting impact to failed exploitation attempts.
🎯 Exploit Status
Reflected XSS vulnerabilities are commonly weaponized in phishing campaigns and require minimal technical skill to exploit.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.9 or later
Vendor Advisory: https://plugins.trac.wordpress.org/browser/clikstats/trunk/ck_admin.php
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Clik stats plugin. 4. Click 'Update Now' if update available. 5. If no update, deactivate and delete plugin, then install latest version from WordPress repository.
🔧 Temporary Workarounds
Web Application Firewall Rule
allBlock malicious XSS payloads targeting the $_SERVER['PHP_SELF'] parameter
ModSecurity rule: SecRule ARGS_GET "@rx <script" "id:1001,phase:2,deny,status:403,msg:'XSS Attack Detected'"
Content Security Policy Header
linuxImplement CSP to prevent script execution from untrusted sources
Add to .htaccess: Header set Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline'"
🧯 If You Can't Patch
- Disable or remove the Clik stats plugin immediately
- Implement strict Content Security Policy headers to mitigate XSS impact
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for Clik stats version 0.8 or earlierCheck Version:
wp plugin list --name=clikstats --field=versionVerify Fix Applied:
Verify plugin version is 0.9 or later and test admin pages for XSS payloads📡 Detection & Monitoring
Log Indicators:
- HTTP requests containing <script> tags or JavaScript payloads in URL parameters
- Multiple 403 errors from WAF blocking XSS attempts
Network Indicators:
- Unusual traffic patterns to admin-ajax.php or wp-admin pages with encoded payloads
SIEM Query:
source="web_server" AND (url="*PHP_SELF*" AND (content="*<script>*" OR content="*javascript:*"))