CVE-2024-8090
📋 TL;DR
This vulnerability in the JavaScript Logic WordPress plugin allows attackers to perform Cross-Site Request Forgery (CSRF) attacks that inject stored cross-site scripting (XSS) payloads. Attackers can trick logged-in administrators into executing malicious actions without their knowledge, potentially compromising WordPress sites. All WordPress sites using vulnerable versions of the JavaScript Logic plugin are affected.
💻 Affected Systems
- JavaScript Logic WordPress Plugin
📦 What is this software?
Javascript Logic by Justintadlock
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain administrative access to WordPress sites, deface websites, steal sensitive data, or install backdoors for persistent access.
Likely Case
Attackers inject malicious JavaScript that steals session cookies, redirects users to phishing sites, or displays unwanted content.
If Mitigated
With proper CSRF protections and input validation, the attack would fail, preventing unauthorized actions.
🎯 Exploit Status
Exploitation requires social engineering to trick an administrator into clicking a malicious link while logged in.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: https://wpscan.com/vulnerability/c9dcd450-e8ed-4058-b002-20fb3b879ee0/
Restart Required: No
Instructions:
1. Remove the JavaScript Logic plugin from your WordPress installation. 2. Check for any malicious code that may have been injected. 3. Consider using alternative plugins with proper security controls.
🔧 Temporary Workarounds
Disable JavaScript Logic Plugin
allDeactivate and delete the vulnerable plugin to prevent exploitation.
wp plugin deactivate javascript-logic
wp plugin delete javascript-logic
Implement CSRF Protection
allAdd CSRF tokens to WordPress forms and implement proper input validation.
🧯 If You Can't Patch
- Restrict administrator access to trusted networks only.
- Implement web application firewall (WAF) rules to block XSS payloads.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for 'JavaScript Logic' version 0.1 or earlier.Check Version:
wp plugin list --name=javascript-logic --field=versionVerify Fix Applied:
Confirm the plugin is no longer installed or active in WordPress.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to WordPress admin-ajax.php or plugin-specific endpoints.
- Administrator accounts performing unexpected plugin modifications.
Network Indicators:
- HTTP requests containing JavaScript payloads in POST parameters.
- CSRF attacks originating from external domains.
SIEM Query:
source="wordpress.log" AND ("javascript-logic" OR "admin-ajax.php") AND (POST AND ("script" OR "javascript" OR "onerror"))