CVE-2024-54040
📋 TL;DR
This stored Cross-Site Scripting (XSS) vulnerability in Adobe Connect allows attackers to inject malicious JavaScript into vulnerable form fields. When users visit pages containing the compromised fields, their browsers execute the attacker's scripts. Organizations using Adobe Connect versions 12.6, 11.4.7 and earlier are affected.
💻 Affected Systems
- Adobe Connect
📦 What is this software?
Connect by Adobe
Connect by Adobe
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, perform actions as authenticated users, redirect to malicious sites, or install malware on user systems.
Likely Case
Session hijacking, credential theft, or defacement of Adobe Connect pages through injected content.
If Mitigated
Limited impact with proper input validation, output encoding, and Content Security Policy (CSP) headers in place.
🎯 Exploit Status
Exploitation requires access to vulnerable form fields, which typically requires some level of access to the Adobe Connect instance.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to Adobe Connect 12.7 or 11.4.8
Vendor Advisory: https://helpx.adobe.com/security/products/connect/apsb24-99.html
Restart Required: Yes
Instructions:
1. Download the latest Adobe Connect version from Adobe's official website. 2. Backup your current installation and configuration. 3. Install the update following Adobe's deployment guide. 4. Restart the Adobe Connect services.
🔧 Temporary Workarounds
Implement Content Security Policy
allAdd strict CSP headers to prevent execution of unauthorized scripts
Add 'Content-Security-Policy' header with appropriate directives to web server configuration
Input Validation Filtering
allImplement server-side validation to sanitize all user inputs
Implement input validation routines in application code to filter script tags and JavaScript
🧯 If You Can't Patch
- Restrict access to Adobe Connect to trusted users only
- Implement web application firewall (WAF) rules to block XSS payloads
🔍 How to Verify
Check if Vulnerable:
Check Adobe Connect version in administration panel or via version file in installation directoryCheck Version:
Check Admin panel > About or examine version.txt in installation directoryVerify Fix Applied:
Verify version is 12.7 or 11.4.8 or later, and test form fields for XSS by attempting to inject basic script payloads📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to form endpoints with script-like content
- Multiple failed login attempts following suspicious form submissions
Network Indicators:
- HTTP requests containing script tags or JavaScript in form parameters
- Unexpected outbound connections from user browsers after visiting Adobe Connect pages
SIEM Query:
source="adobe_connect" AND (http_method="POST" AND (uri_path="*form*" OR uri_path="*submit*") AND (http_query="*<script>*" OR http_query="*javascript:*"))