CVE-2024-52816
📋 TL;DR
Adobe Experience Manager versions 6.5.21 and earlier contain a stored Cross-Site Scripting (XSS) vulnerability where attackers can inject malicious scripts into form fields. When users visit pages containing these compromised fields, their browsers execute the malicious JavaScript. This affects organizations using vulnerable Adobe Experience Manager instances for content management.
💻 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 browsers.
Likely Case
Session hijacking, credential theft, or defacement of web pages through injected content.
If Mitigated
Limited impact with proper input validation, output encoding, and Content Security Policy (CSP) headers in place.
🎯 Exploit Status
Requires attacker to have access to input vulnerable form fields; exploitation is straightforward once access is obtained.
🛠️ 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 official site. 2. Follow Adobe's upgrade guide for your deployment type (on-premise or cloud). 3. Apply the update and restart the AEM service. 4. Verify the update by checking the version in the AEM console.
🔧 Temporary Workarounds
Implement Content Security Policy (CSP)
allAdd CSP headers to restrict script execution from untrusted sources.
Add 'Content-Security-Policy' header in web server configuration (e.g., Apache/Nginx) or AEM dispatcher.
Input Validation and Output Encoding
allSanitize all user inputs in form fields and encode outputs to prevent script injection.
Configure AEM to use built-in XSS protection filters and validate inputs via custom servlets or components.
🧯 If You Can't Patch
- Restrict access to vulnerable form fields to trusted users only.
- Monitor logs for suspicious input patterns and implement web application firewall (WAF) rules to block XSS payloads.
🔍 How to Verify
Check if Vulnerable:
Check the AEM version via the AEM console at /system/console/status-productinfo or review release notes for version 6.5.21 or earlier.Check Version:
curl -k https://<aem-host>:<port>/system/console/status-productinfo | grep 'Adobe Experience Manager'Verify Fix Applied:
Confirm the AEM version is 6.5.22 or later and test form fields for XSS by attempting to inject basic scripts (in a controlled environment).📡 Detection & Monitoring
Log Indicators:
- Unusual input patterns in form submissions (e.g., script tags, JavaScript code) in AEM access logs.
Network Indicators:
- HTTP requests containing malicious script payloads to AEM endpoints.
SIEM Query:
source="aem_access.log" AND (message="*<script>*" OR message="*javascript:*")