CVE-2024-36220
📋 TL;DR
Adobe Experience Manager versions 6.5.20 and earlier contain a DOM-based Cross-Site Scripting vulnerability that allows attackers to execute arbitrary JavaScript in victims' browsers. Exploitation requires user interaction like clicking malicious links. This affects AEM instances running vulnerable versions.
💻 Affected Systems
- Adobe Experience Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attacker steals session cookies, performs actions as authenticated user, or redirects to phishing sites, potentially leading to account compromise or data theft.
Likely Case
Session hijacking, defacement of web pages, or credential theft through phishing attacks.
If Mitigated
Limited impact with proper Content Security Policy headers and input validation in place.
🎯 Exploit Status
Exploitation requires user interaction and knowledge of vulnerable endpoints.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.5.21 or later
Vendor Advisory: https://helpx.adobe.com/security/products/experience-manager/apsb24-28.html
Restart Required: Yes
Instructions:
1. Download AEM 6.5.21 or later from Adobe distribution. 2. Apply Service Pack following Adobe's upgrade documentation. 3. Restart AEM instance. 4. Verify successful update.
🔧 Temporary Workarounds
Implement Content Security Policy
allAdd CSP headers to restrict script execution from untrusted sources
Add 'Content-Security-Policy' header to web server configuration
Input Validation Filter
allImplement server-side validation for all user inputs
Configure AEM filters to sanitize user inputs
🧯 If You Can't Patch
- Implement strict Content Security Policy with script-src directives
- Deploy WAF with XSS protection rules and monitor for attack attempts
🔍 How to Verify
Check if Vulnerable:
Check AEM version via CRXDE Lite or system console. If version is 6.5.20 or earlier, system is vulnerable.Check Version:
curl -k https://<aem-host>:<port>/system/console/status-productinfo | grep 'Adobe Experience Manager'Verify Fix Applied:
Verify AEM version is 6.5.21 or later and test vulnerable endpoints with XSS payloads.📡 Detection & Monitoring
Log Indicators:
- Unusual JavaScript payloads in request logs
- Multiple requests to same endpoint with encoded scripts
Network Indicators:
- HTTP requests containing script tags or JavaScript events
- Unusual redirect patterns
SIEM Query:
source="aem-access.log" AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")