CVE-2024-26081
📋 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 Adobe Experience Manager versions 6.5.20 and earlier.
💻 Affected Systems
- Adobe Experience Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, perform actions as authenticated users, redirect to malicious sites, or install malware on victim systems.
Likely Case
Session hijacking, credential theft, or defacement of web pages through injected content.
If Mitigated
Limited impact with proper input validation, output encoding, and Content Security Policy (CSP) headers in place.
🎯 Exploit Status
Stored XSS typically requires some level of access to input fields, but exploitation is straightforward once access is obtained.
🛠️ 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 official distribution. 2. Follow Adobe's upgrade documentation for your deployment type (AEM as a Cloud Service or on-premise). 3. Apply the update to all affected instances. 4. Restart the AEM service.
🔧 Temporary Workarounds
Input Validation and Output Encoding
allImplement strict input validation and output encoding for all user-controllable form fields.
Content Security Policy (CSP)
allImplement a strict Content Security Policy header to restrict script execution sources.
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block XSS payloads
- Restrict access to vulnerable form fields to trusted users only
🔍 How to Verify
Check if Vulnerable:
Check Adobe Experience Manager version via AEM Web Console (/system/console/bundles) or by reviewing installation logs.Check Version:
Check AEM version via: curl -k https://<aem-host>:<port>/system/console/bundles | grep 'Adobe Experience Manager'Verify Fix Applied:
Verify version is 6.5.21 or later and test form fields with XSS payloads to ensure proper sanitization.📡 Detection & Monitoring
Log Indicators:
- Unusual form submissions with script tags or JavaScript code
- Multiple failed XSS attempts in access logs
Network Indicators:
- HTTP requests containing common XSS payloads to form endpoints
SIEM Query:
source="aem-access.log" AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")