CVE-2024-8738
📋 TL;DR
The Seriously Simple Stats WordPress plugin contains a reflected cross-site scripting (XSS) vulnerability that allows unauthenticated attackers to inject malicious scripts via crafted URLs. When victims click malicious links, attackers can steal session cookies, redirect users, or perform actions on their behalf. All WordPress sites using this plugin up to version 1.6.0 are affected.
💻 Affected Systems
- Seriously Simple Stats WordPress Plugin
📦 What is this software?
⚠️ 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 to hijack accounts, redirect users to phishing sites, or perform limited actions within user permissions.
If Mitigated
With proper web application firewalls and security headers, malicious scripts are blocked before execution, preventing successful exploitation.
🎯 Exploit Status
Exploitation requires social engineering to trick users into clicking malicious links; no authentication required for initial injection.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.6.1
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Seriously Simple Stats. 4. Click 'Update Now' if available. 5. Alternatively, download version 1.6.1+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Web Application Firewall (WAF)
allDeploy a WAF with XSS protection rules to block malicious script injection attempts.
Content Security Policy (CSP)
allImplement strict CSP headers to prevent execution of inline scripts and restrict script sources.
Header set Content-Security-Policy "default-src 'self'; script-src 'self'"
Header set X-Content-Type-Options "nosniff"
Header set X-Frame-Options "SAMEORIGIN"
🧯 If You Can't Patch
- Disable or remove the Seriously Simple Stats plugin immediately.
- Implement network-level filtering to block requests containing suspicious query parameters targeting the vulnerable endpoint.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Seriously Simple Stats → Version. If version is 1.6.0 or lower, the site is vulnerable.Check Version:
wp plugin list --name=seriously-simple-stats --field=versionVerify Fix Applied:
After updating, verify plugin version shows 1.6.1 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- HTTP requests with suspicious query parameters containing script tags or JavaScript code
- Multiple failed XSS attempts from same IP
- Unusual redirects or cookie theft reports
Network Indicators:
- HTTP requests with encoded script payloads in URL parameters
- Traffic patterns showing users clicking on links with long, encoded query strings
SIEM Query:
source="web_logs" AND (url="*<script*" OR url="*javascript:*" OR url="*onload=*" OR url="*onerror=*") AND url="*seriously-simple-stats*"🔗 References
- https://plugins.trac.wordpress.org/browser/seriously-simple-stats/trunk/php/classes/class-ssp-stats.php#L1296
- https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3153423%40seriously-simple-stats&new=3153423%40seriously-simple-stats&sfp_email=&sfph_mail=
- https://www.wordfence.com/threat-intel/vulnerabilities/id/f7f810f6-b8dd-4065-8113-9842b33202ef?source=cve
