CVE-2024-43712
📋 TL;DR
This DOM-based XSS vulnerability in Adobe Experience Manager allows attackers to execute arbitrary JavaScript in victims' browsers by tricking users into clicking malicious links. It affects AEM versions 6.5.21 and earlier. Successful exploitation requires user interaction but could lead to session hijacking or data theft.
💻 Affected Systems
- Adobe Experience Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attacker steals admin session cookies, gains administrative access to AEM, and potentially compromises the entire content management system and associated data.
Likely Case
Attacker steals user session cookies, performs actions as authenticated users, and potentially accesses sensitive content or user data.
If Mitigated
With proper input validation and output encoding, the attack fails to execute malicious scripts, limiting impact to failed exploitation attempts.
🎯 Exploit Status
Exploitation requires user interaction (clicking malicious link) but no authentication to AEM is needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.5.22 or later
Vendor Advisory: https://helpx.adobe.com/security/products/experience-manager/apsb24-69.html
Restart Required: Yes
Instructions:
1. Download AEM 6.5.22 or later from Adobe's distribution portal. 2. Apply the service pack following Adobe's upgrade documentation. 3. Restart all AEM instances. 4. Verify the update was successful.
🔧 Temporary Workarounds
Content Security Policy Implementation
allImplement strict CSP headers to prevent execution of inline scripts and restrict script sources
Add 'Content-Security-Policy: script-src 'self';' to web server configuration
Input Validation Filter
allImplement custom servlet filters to sanitize user input before DOM manipulation
Implement Java servlet filter with OWASP Java Encoder library for output encoding
🧯 If You Can't Patch
- Implement Web Application Firewall (WAF) with XSS protection rules
- Disable or restrict user-controllable input fields in vulnerable components
🔍 How to Verify
Check if Vulnerable:
Check AEM version via CRXDE Lite or OSGi console. If version is 6.5.21 or earlier, system is vulnerable.Check Version:
curl -u admin:password http://localhost:4502/system/console/status-productinfo | grep 'Adobe Experience Manager'Verify Fix Applied:
Verify AEM version is 6.5.22 or later and test vulnerable endpoints with XSS payloads that should be sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual JavaScript payloads in request parameters
- Multiple failed XSS attempts from same IP
Network Indicators:
- Requests containing script tags or JavaScript events in URL parameters
- External script loads from suspicious domains
SIEM Query:
source="aem-access.log" AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")