CVE-2024-52864
📋 TL;DR
This CVE describes a stored Cross-Site Scripting (XSS) vulnerability in Adobe Experience Manager (AEM) versions 6.5.21 and earlier. It allows attackers to inject malicious scripts into vulnerable form fields, which execute in victims' browsers when they view the compromised page. Organizations using affected AEM versions are at risk, particularly if the AEM instance is internet-facing or accessible to untrusted users.
💻 Affected Systems
- Adobe Experience Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An attacker could steal session cookies, redirect users to malicious sites, or perform actions on behalf of authenticated users, potentially leading to data theft or account compromise.
Likely Case
Attackers exploit this to deface websites, steal user session data, or deliver malware via the compromised AEM instance.
If Mitigated
With proper input validation, output encoding, and Content Security Policy (CSP) in place, the impact is reduced to minimal or no exploitation.
🎯 Exploit Status
Exploitation requires the attacker to have access to inject scripts into vulnerable form fields, which may involve authenticated access or social engineering.
🛠️ 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. Backup your AEM instance. 2. Download and apply the latest patch from Adobe's official site. 3. Restart the AEM service to apply changes. 4. Verify the update by checking the version.
🔧 Temporary Workarounds
Implement Content Security Policy (CSP)
allAdd a CSP header to restrict script execution from untrusted sources, mitigating XSS attacks.
Add 'Content-Security-Policy: default-src 'self'; script-src 'self'' to HTTP headers
Input Validation and Sanitization
allEnforce strict input validation and output encoding on all form fields to prevent script injection.
Configure AEM filters or custom validators to sanitize user inputs
🧯 If You Can't Patch
- Restrict access to AEM admin interfaces and form submission endpoints to trusted IPs only.
- Monitor and audit logs for suspicious activity related to form submissions or script injections.
🔍 How to Verify
Check if Vulnerable:
Check the AEM version via the admin console or system info; if it is 6.5.21 or earlier, it is vulnerable.Check Version:
curl -k https://<aem-host>:<port>/system/console/status-productinfo | grep 'Adobe Experience Manager'Verify Fix Applied:
After patching, confirm the version is 6.5.22 or later and test form fields for XSS by attempting to inject scripts in a controlled environment.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to form endpoints with script-like payloads
- Errors related to script execution in access logs
Network Indicators:
- HTTP requests containing JavaScript code in parameters or headers
- Unexpected redirects or script loads from AEM pages
SIEM Query:
source="aem_logs" AND (http_method="POST" AND uri="/content/forms/af/*" AND (body CONTAINS "<script>" OR body CONTAINS "javascript:"))