CVE-2024-43747
📋 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 the 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 inject malicious scripts to steal user session data or credentials from users who visit compromised pages.
If Mitigated
With proper input validation and output encoding, malicious scripts would be neutralized before reaching user browsers.
🎯 Exploit Status
Exploitation requires access to vulnerable form fields, which typically requires some level of access to the AEM interface.
🛠️ 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 installation guide. 3. Restart all AEM instances. 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
Content Security Policy
allImplement CSP headers to restrict script execution
Add 'Content-Security-Policy' header to dispatcher configuration
🧯 If You Can't Patch
- Restrict access to vulnerable form fields using AEM permissions
- 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-productinfoVerify Fix Applied:
After patching, verify version is 6.5.22 or later. Test form fields with basic XSS payloads to ensure they're properly sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual content modifications in form fields
- JavaScript payloads in request logs
- Multiple failed XSS attempts
Network Indicators:
- Suspicious script tags in HTTP POST requests to form endpoints
SIEM Query:
source="aem_access.log" AND ("<script>" OR "javascript:" OR "onload=" OR "onerror=")