CVE-2024-52838
📋 TL;DR
This DOM-based XSS vulnerability in Adobe Experience Manager allows attackers to execute arbitrary JavaScript in victims' browsers by manipulating DOM elements through crafted URLs or inputs. It affects users of Adobe Experience Manager versions 6.5.21 and earlier who interact with malicious links or compromised forms. Successful exploitation requires user interaction but can lead to session hijacking or data theft.
💻 Affected Systems
- Adobe Experience Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attacker gains full control of victim's browser session, leading to account takeover, data exfiltration, or further attacks on internal systems.
Likely Case
Session hijacking, cookie theft, or credential harvesting from authenticated users who click malicious links.
If Mitigated
Limited impact with proper input validation, output encoding, and Content Security Policy (CSP) headers in place.
🎯 Exploit Status
Exploitation requires user interaction (clicking malicious link or submitting crafted input).
🛠️ 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. Follow Adobe's upgrade documentation for your deployment type (on-premise or cloud). 3. Apply the update and restart all AEM instances. 4. Verify the update was successful.
🔧 Temporary Workarounds
Implement Content Security Policy
allAdd CSP headers to restrict script execution sources and prevent inline script execution.
Add 'Content-Security-Policy: script-src 'self'' to web server configuration
Input Validation Filter
allImplement server-side input validation to sanitize user inputs before DOM manipulation.
Configure AEM filters to sanitize URL parameters and form inputs
🧯 If You Can't Patch
- Implement strict Content Security Policy (CSP) headers to prevent script execution from untrusted sources.
- Deploy web application firewall (WAF) rules to detect and block XSS payloads in URLs and inputs.
🔍 How to Verify
Check if Vulnerable:
Check AEM version via AEM Web Console (/system/console/status-productinfo) or CRX Package Manager.Check Version:
curl -k https://<aem-host>:<port>/system/console/status-productinfo | grep 'Adobe Experience Manager'Verify Fix Applied:
Verify version is 6.5.22 or later and test with XSS payloads in URL parameters and form inputs.📡 Detection & Monitoring
Log Indicators:
- Unusual URL parameters containing script tags or JavaScript payloads in access logs
- Multiple failed login attempts from same session after suspicious URL access
Network Indicators:
- HTTP requests with suspicious parameters containing <script> tags or JavaScript functions
- Outbound connections to unknown domains from AEM server
SIEM Query:
source="aem_access.log" AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")