CVE-2024-36200
📋 TL;DR
This stored XSS vulnerability in Adobe Experience Manager allows attackers to inject malicious JavaScript into vulnerable form fields. When users visit pages containing these compromised fields, their browsers execute the attacker's code. This affects all Adobe Experience Manager versions 6.5.20 and earlier.
💻 Affected Systems
- Adobe Experience Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator credentials, hijack user sessions, deface websites, or redirect users to malicious sites, potentially leading to complete system compromise.
Likely Case
Attackers would typically steal session cookies or user credentials, perform actions on behalf of authenticated users, or deploy keyloggers to capture sensitive information.
If Mitigated
With proper input validation and output encoding, the vulnerability would be prevented, though the vulnerable code would still exist in the system.
🎯 Exploit Status
Exploitation requires the attacker to have access to vulnerable form fields, which typically requires some level of access to the AEM interface.
🛠️ 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 Adobe Experience Manager 6.5.21 or later from Adobe's official distribution channels. 2. Follow Adobe's upgrade documentation for your specific deployment type (on-premise or cloud). 3. Apply the update to all affected instances. 4. Restart the AEM service to complete the update.
🔧 Temporary Workarounds
Input Validation Filter
allImplement custom servlet filters to sanitize all user input before processing
Implement custom Java servlet filter with input validation logic
Content Security Policy
allImplement strict CSP headers to prevent script execution from untrusted sources
Add 'Content-Security-Policy' header with script-src directives
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block XSS payloads
- Disable or restrict access to vulnerable form fields through AEM permissions
🔍 How to Verify
Check if Vulnerable:
Check AEM version via the welcome screen or system console. Versions 6.5.20 and earlier are vulnerable.Check Version:
Check AEM welcome page or use CRXDE Lite to view system propertiesVerify Fix Applied:
After updating, verify the version is 6.5.21 or later and test form fields with XSS payloads to ensure they're properly sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to form endpoints with script tags
- Multiple failed login attempts following form submissions
- Suspicious user agent strings in access logs
Network Indicators:
- HTTP requests containing script tags or JavaScript in form parameters
- Unusual outbound connections from AEM servers
SIEM Query:
source="aem_logs" AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")