CVE-2024-43740
📋 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 view the compromised page. This affects all users of vulnerable Adobe Experience Manager instances.
💻 Affected Systems
- Adobe Experience Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, redirect users to malicious sites, perform actions on behalf of authenticated users, or deploy additional malware payloads.
Likely Case
Session hijacking, credential theft, or defacement of web pages through injected content.
If Mitigated
Limited impact with proper input validation and output encoding, though stored XSS remains a persistent threat.
🎯 Exploit Status
Exploitation requires ability to submit data to vulnerable form fields, but stored nature makes it persistent.
🛠️ 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 to all affected instances. 4. Restart the AEM service.
🔧 Temporary Workarounds
Input Validation and Sanitization
allImplement server-side input validation and output encoding for all form fields
Content Security Policy
allImplement strict Content Security Policy headers to restrict script execution
🧯 If You Can't Patch
- Implement web application firewall rules to block XSS payloads
- Disable or restrict access to vulnerable form fields until patching is possible
🔍 How to Verify
Check if Vulnerable:
Check Adobe Experience Manager version via AEM Web Console (/system/console/bundles) or CRXDE LiteCheck Version:
curl -k https://<aem-host>:<port>/system/console/bundles | grep 'Adobe Experience Manager'Verify Fix Applied:
Verify version is 6.5.22 or later and test form fields with XSS payloads to confirm sanitization📡 Detection & Monitoring
Log Indicators:
- Unusual form submissions with script tags or JavaScript payloads
- Multiple failed XSS attempts in request logs
Network Indicators:
- HTTP requests containing script injection patterns to form endpoints
SIEM Query:
source="aem_access.log" AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")