CVE-2024-36158
📋 TL;DR
Adobe Experience Manager versions 6.5.20 and earlier contain a stored Cross-Site Scripting (XSS) vulnerability where attackers can inject malicious JavaScript into vulnerable form fields. When users visit pages containing these compromised fields, their browsers execute the malicious scripts. This affects organizations using vulnerable Adobe Experience Manager installations.
💻 Affected Systems
- Adobe Experience Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal user session cookies, perform actions as authenticated users, redirect to malicious sites, or install malware through drive-by downloads.
Likely Case
Attackers would typically steal session cookies to hijack user accounts, deface websites, or redirect users to phishing pages.
If Mitigated
With proper input validation and output encoding, the vulnerability would be prevented, though the underlying code flaw remains.
🎯 Exploit Status
Exploitation requires the ability to submit data to vulnerable form fields, which typically requires some level of access or user interaction.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.5.21 or later
Vendor Advisory: https://helpx.adobe.com/security/products/experience-manager/apsb24-28.html
Restart Required: Yes
Instructions:
1. Download Adobe Experience Manager 6.5.21 or later from Adobe's distribution portal. 2. Apply the service pack following Adobe's installation guide. 3. Restart the AEM instance. 4. Verify the update was successful.
🔧 Temporary Workarounds
Input Validation and Output Encoding
allImplement strict input validation and output encoding for all user-controllable form fields
Content Security Policy
allImplement a strict Content Security Policy to prevent execution of unauthorized scripts
🧯 If You Can't Patch
- Implement Web Application Firewall (WAF) 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 the AEM welcome page or OSGi console. Versions 6.5.20 and earlier are vulnerable.Check Version:
Check AEM welcome page at http://[host]:[port]/system/console/status-productinfo or use CRXDE LiteVerify Fix Applied:
Verify the version is 6.5.21 or later and test form fields for XSS vulnerabilities using safe payloads.📡 Detection & Monitoring
Log Indicators:
- Unusual form submissions with script tags or JavaScript code
- Multiple failed XSS attempts in request logs
Network Indicators:
- HTTP requests containing script injection patterns to form endpoints
SIEM Query:
source="aem_logs" AND ("<script" OR "javascript:" OR "onerror=" OR "onload=")