CVE-2024-52991
📋 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 code. This affects all Adobe Experience Manager versions 6.5.21 and earlier.
💻 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 visitors, potentially stealing session data or performing limited unauthorized actions.
If Mitigated
With proper input validation and output encoding, the risk is reduced to minimal, though the vulnerability still exists in the codebase.
🎯 Exploit Status
Exploitation requires access to content authoring interfaces. The vulnerability is in form field handling where user input isn't properly sanitized.
🛠️ 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 distribution. 2. Follow Adobe's upgrade documentation for your deployment type (on-premise or cloud). 3. Apply the update package. 4. Restart all AEM instances. 5. Verify the update was successful.
🔧 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 Content Security Policy headers to limit script execution.
Add 'Content-Security-Policy' header with script-src directives
🧯 If You Can't Patch
- Restrict content authoring permissions to trusted users only
- Implement web application firewall rules to detect and block XSS payloads
🔍 How to Verify
Check if Vulnerable:
Check AEM version via OSGi console or CRXDE. If version is 6.5.21 or earlier, system is vulnerable.Check Version:
curl -u admin:admin http://localhost:4502/system/console/status-productinfo.json | 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 ensure they're properly sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual content modifications
- Suspicious script tags in content updates
- Multiple failed XSS attempts in request logs
Network Indicators:
- Malicious script payloads in HTTP POST requests to content authoring endpoints
SIEM Query:
source="aem-access.log" AND ("<script>" OR "javascript:" OR "onload=" OR "onerror=")