CVE-2024-52834
📋 TL;DR
Adobe Experience Manager versions 6.5.21 and earlier contain a stored cross-site scripting vulnerability in form fields. An attacker can inject malicious JavaScript that executes in victims' browsers when they visit compromised pages. This affects all users of vulnerable AEM instances.
💻 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 deploy malware through browser exploitation.
Likely Case
Session hijacking, credential theft, defacement of web pages, or limited data exfiltration from user browsers.
If Mitigated
With proper input validation and output encoding, the vulnerability would be prevented despite the underlying code flaw.
🎯 Exploit Status
Stored XSS typically requires some level of access to input fields but is straightforward to exploit 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 AEM 6.5.22 or later from Adobe distribution. 2. Follow Adobe's upgrade documentation. 3. Apply the hotfix if using older version. 4. Restart AEM instance. 5. Verify upgrade completion.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side input validation to sanitize form field inputs before processing.
Configure AEM filters via OSGi console or repository nodes
Content Security Policy
allImplement strict CSP headers to mitigate XSS impact by restricting script execution.
Add 'Content-Security-Policy' header via dispatcher or web server configuration
🧯 If You Can't Patch
- Restrict access to vulnerable form fields using AEM permissions and access controls.
- Implement web application firewall rules to block XSS payload patterns.
🔍 How to Verify
Check if Vulnerable:
Check AEM version via CRXDE Lite or system console; versions 6.5.21 or earlier are vulnerable.Check Version:
curl -u admin:password http://localhost:4502/system/console/status-productinfo | grep 'Adobe Experience Manager'Verify Fix Applied:
Verify AEM version is 6.5.22 or later and test form fields with XSS payloads in a safe environment.📡 Detection & Monitoring
Log Indicators:
- Unusual form submissions with script tags
- Multiple failed XSS attempts in request logs
- Suspicious content creation/modification events
Network Indicators:
- HTTP requests containing script tags or JavaScript in form parameters
- Unexpected outbound connections from user browsers
SIEM Query:
source="aem-access.log" AND ("<script" OR "javascript:" OR "onerror=" OR "onload=")