CVE-2024-43722
📋 TL;DR
Adobe Experience Manager versions 6.5.21 and earlier contain a DOM-based Cross-Site Scripting vulnerability that allows attackers to execute arbitrary JavaScript in victims' browsers by manipulating URLs or user input. This requires user interaction where victims access malicious links. The vulnerability affects AEM instances with web interfaces accessible to users.
💻 Affected Systems
- Adobe Experience Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attacker steals authenticated session cookies, performs actions as the victim user (including administrative actions if victim has admin privileges), and potentially compromises the entire AEM instance.
Likely Case
Attacker steals user session cookies to gain unauthorized access to the AEM system, potentially accessing sensitive content or performing unauthorized content modifications.
If Mitigated
With proper input validation and output encoding, the attack would fail to execute malicious scripts, limiting impact to failed exploitation attempts.
🎯 Exploit Status
Exploitation requires user interaction (victim clicking malicious link) and knowledge of vulnerable DOM elements. No public exploit code is currently available.
🛠️ 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 Adobe Experience Manager 6.5.22 or later from Adobe's distribution portal. 2. Apply the service pack following Adobe's installation instructions. 3. Restart the AEM instance. 4. Verify the update was successful.
🔧 Temporary Workarounds
Input Validation Filter
allImplement custom servlet filters to sanitize user input and URL parameters before processing.
Implement Java servlet filter with input validation logic for all user-controlled parameters
Content Security Policy
allImplement strict Content Security Policy headers to restrict script execution sources.
Add 'Content-Security-Policy: script-src 'self'' to HTTP response headers
🧯 If You Can't Patch
- Implement Web Application Firewall (WAF) rules to detect and block XSS payloads in URLs and parameters
- Educate users about phishing risks and implement URL filtering to block suspicious links
🔍 How to Verify
Check if Vulnerable:
Check AEM version via CRXDE Lite or system console. If version is 6.5.21 or earlier, the system is vulnerable.Check Version:
curl -k https://<aem-host>:<port>/system/console/status-productinfo | grep 'Adobe Experience Manager'Verify Fix Applied:
After patching, verify version is 6.5.22 or later and test vulnerable endpoints with XSS payloads to confirm they are properly sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual URL parameters containing script tags or JavaScript code
- Multiple failed login attempts from unexpected user sessions
- Requests with encoded script payloads in query strings
Network Indicators:
- HTTP requests containing <script> tags or javascript: URIs in parameters
- Unusual redirect patterns to external domains
SIEM Query:
source="aem-access.log" AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")