CVE-2024-36160
📋 TL;DR
Adobe Experience Manager versions 6.5.20 and earlier contain a stored XSS vulnerability where attackers can inject malicious JavaScript into form fields. When users visit pages containing these compromised fields, their browsers execute the attacker's code. This affects all organizations running vulnerable AEM instances.
💻 Affected Systems
- Adobe Experience Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator session cookies, perform actions as authenticated users, deface websites, or redirect users to malicious sites.
Likely Case
Attackers inject malicious scripts to steal user session data or credentials from authenticated users visiting compromised pages.
If Mitigated
With proper input validation and output encoding, the vulnerability would be prevented despite the underlying code flaw.
🎯 Exploit Status
Exploitation requires attacker access to inject scripts into vulnerable form fields, but execution is straightforward once injected.
🛠️ 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's distribution portal. 2. Apply the service pack following Adobe's upgrade documentation. 3. Restart the AEM instance. 4. Verify the update completed successfully.
🔧 Temporary Workarounds
Implement Content Security Policy
allAdd CSP headers to restrict script execution from untrusted sources
Add 'Content-Security-Policy' header with appropriate directives to web server configuration
Input Validation Filter
allDeploy custom servlet filter to sanitize form field inputs
Implement Java servlet filter that validates and sanitizes all form submissions
🧯 If You Can't Patch
- Restrict user permissions to only trusted administrators for form editing
- Implement WAF rules to block XSS payload patterns in form submissions
🔍 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 -u admin:password http://localhost:4502/system/console/status-productinfo | grep 'Adobe Experience Manager'Verify Fix Applied:
After patching, verify version is 6.5.21 or later and test form fields with XSS payloads to confirm sanitization.📡 Detection & Monitoring
Log Indicators:
- Unusual form submissions with script tags or JavaScript code
- Multiple failed login attempts followed by form edits
Network Indicators:
- HTTP requests containing script tags in form parameters
- Outbound connections to suspicious domains from AEM server
SIEM Query:
source="aem_logs" AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")