CVE-2024-36168
📋 TL;DR
This stored Cross-Site Scripting (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 scripts. This affects 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 session cookies, perform actions as authenticated users, redirect to malicious sites, or install malware on victim systems.
Likely Case
Session hijacking, credential theft, defacement of web pages, or redirection to phishing sites.
If Mitigated
Limited impact with proper input validation, output encoding, and Content Security Policy (CSP) headers in place.
🎯 Exploit Status
Exploitation requires ability to submit data to vulnerable form fields. 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 distribution portal. 2. Apply the service pack following Adobe's installation guide. 3. Restart the AEM instance. 4. Verify the update was successful.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement server-side input validation and output encoding for all form fields
Content Security Policy
allImplement strict CSP headers to prevent script execution from untrusted sources
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block XSS payloads
- Disable or restrict access to vulnerable form fields and components
🔍 How to Verify
Check if Vulnerable:
Check AEM version via the Welcome screen or OSGi console. Versions 6.5.20 and earlier are vulnerable.Check Version:
Check via AEM Welcome screen or use CRXDE Lite to examine /libs/cq/core/content/welcome.htmlVerify Fix Applied:
Verify AEM version is 6.5.21 or later and test form fields for proper input sanitization.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to form endpoints
- Requests containing script tags or JavaScript in form data
Network Indicators:
- HTTP requests with suspicious payloads in form parameters
- Outbound connections to unknown domains following form submissions
SIEM Query:
source="aem-access.log" AND ("<script>" OR "javascript:" OR "onload=" OR "onerror=")