CVE-2024-26089
📋 TL;DR
This DOM-based Cross-Site Scripting vulnerability in Adobe Experience Manager allows attackers to execute arbitrary JavaScript in victims' browsers when they visit maliciously crafted pages. It affects AEM versions 6.5.20 and earlier, requiring user interaction for exploitation.
💻 Affected Systems
- Adobe Experience Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, perform actions as authenticated users, redirect to malicious sites, or deface web content.
Likely Case
Session hijacking, credential theft, or limited client-side data exfiltration from users who interact with malicious content.
If Mitigated
With proper Content Security Policy and input validation, impact is limited to isolated client-side script execution.
🎯 Exploit Status
Requires user interaction (victim visiting malicious page) and knowledge of vulnerable DOM manipulation points.
🛠️ 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. Follow Adobe's upgrade documentation. 3. Restart AEM instance. 4. Verify successful upgrade.
🔧 Temporary Workarounds
Implement Content Security Policy
allAdd strict CSP headers to prevent script execution from untrusted sources
Add 'Content-Security-Policy: script-src 'self'' to web server configuration
Input Validation Filter
allImplement server-side validation for all user inputs
Configure AEM filters to sanitize user inputs before DOM manipulation
🧯 If You Can't Patch
- Implement Web Application Firewall with XSS protection rules
- Restrict user access to only trusted content sources and implement network segmentation
🔍 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 -s http://localhost:4502/system/console/status-productinfo | grep 'Adobe Experience Manager'Verify Fix Applied:
Verify AEM version is 6.5.21 or later and test DOM manipulation points with XSS payloads.📡 Detection & Monitoring
Log Indicators:
- Unusual JavaScript execution patterns
- Suspicious DOM manipulation requests
- Unexpected script tags in request parameters
Network Indicators:
- Malicious script patterns in HTTP requests
- Unusual outbound connections following DOM manipulation
SIEM Query:
source="aem-access.log" AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")