CVE-2024-52818
📋 TL;DR
Adobe Experience Manager versions 6.5.21 and earlier contain a stored Cross-Site Scripting 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 with content authoring access could inject malicious scripts that affect other users viewing compromised pages, potentially stealing session data.
If Mitigated
With proper input validation and output encoding, the risk is limited to authenticated users with content creation privileges.
🎯 Exploit Status
Exploitation requires access to vulnerable form fields, typically through authenticated content authoring interfaces.
🛠️ 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's distribution portal. 2. Apply the service pack following Adobe's upgrade documentation. 3. Restart the AEM instance. 4. Verify the update was successful.
🔧 Temporary Workarounds
Input Validation Filter
allImplement custom servlet filters to sanitize user input in form fields
Implement Java servlet filter with OWASP Java Encoder library for output encoding
Content Security Policy
allImplement strict CSP headers to mitigate XSS impact
Add 'Content-Security-Policy: default-src 'self'; script-src 'self'' to HTTP headers
🧯 If You Can't Patch
- Restrict content authoring permissions to trusted users only
- Implement web application firewall rules to block XSS payloads
🔍 How to Verify
Check if Vulnerable:
Check AEM version via CRXDE Lite or system console. If version is 6.5.21 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 6.5.22 or later and test form fields with XSS payloads to confirm sanitization.📡 Detection & Monitoring
Log Indicators:
- Unusual content modifications
- Suspicious script tags in content nodes
- Multiple failed XSS attempts
Network Indicators:
- HTTP requests containing script tags or JavaScript in form parameters
SIEM Query:
source="aem-access.log" AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")