CVE-2024-47384
📋 TL;DR
This vulnerability allows attackers to inject malicious scripts into web pages generated by the WP Compress plugin. When users visit a specially crafted URL, the script executes in their browser, potentially stealing session cookies or performing actions on their behalf. All WordPress sites using vulnerable versions of WP Compress – Image Optimizer [All-In-One] are affected.
💻 Affected Systems
- WP Compress – Image Optimizer [All-In-One]
📦 What is this software?
Wp Compress by Wpcompress
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator session cookies, take over WordPress sites, install backdoors, or redirect visitors to malicious sites.
Likely Case
Attackers steal user session cookies or credentials through phishing links, potentially gaining unauthorized access to WordPress admin panels.
If Mitigated
With proper input validation and output encoding, malicious scripts are neutralized before reaching users' browsers.
🎯 Exploit Status
Reflected XSS typically requires user interaction (clicking a malicious link) but is easy to weaponize in phishing campaigns.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.20.14 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find WP Compress – Image Optimizer. 4. Click 'Update Now' if available. 5. Alternatively, download version 6.20.14+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable vulnerable plugin
allTemporarily disable the WP Compress plugin until patched
wp plugin deactivate wp-compress-image-optimizer
Implement WAF rules
linuxAdd web application firewall rules to block XSS payloads
ModSecurity: SecRule ARGS "<script" "id:1001,phase:2,deny"
🧯 If You Can't Patch
- Implement Content Security Policy (CSP) headers to restrict script execution
- Use browser security extensions that block reflected XSS attacks
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → WP Compress version. If version is 6.20.13 or earlier, you are vulnerable.Check Version:
wp plugin get wp-compress-image-optimizer --field=versionVerify Fix Applied:
Verify plugin version is 6.20.14 or later in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual GET/POST requests containing script tags or JavaScript in query parameters
- Multiple failed XSS attempts in web server logs
Network Indicators:
- HTTP requests with suspicious parameters like ?param=<script>alert()</script>
- Traffic patterns showing users accessing unusual URLs with encoded payloads
SIEM Query:
source="web_server.log" AND ("<script" OR "javascript:" OR "onload=" OR "onerror=") AND uri_path="/wp-admin/admin-ajax.php"