CVE-2024-26068
📋 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 the compromised fields, their browsers execute the attacker's scripts. 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 administrator credentials, hijack user sessions, deface websites, or redirect users to malicious sites, potentially leading to complete system compromise.
Likely Case
Attackers steal user session cookies or credentials, perform actions on behalf of authenticated users, or conduct phishing attacks.
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 attacker to have access to vulnerable form fields, which typically requires some level of access or social engineering.
🛠️ 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 Sanitization
allImplement strict input validation and output encoding for all form fields to prevent script injection.
Content Security Policy
allImplement a strict Content Security Policy header to restrict script execution sources.
🧯 If You Can't Patch
- Implement web application firewall rules to block XSS payloads
- Disable or restrict access to vulnerable form fields
🔍 How to Verify
Check if Vulnerable:
Check AEM version via the Welcome screen or OSGi console. If version is 6.5.20 or earlier, the system is vulnerable.Check Version:
Check AEM Welcome screen or use curl: curl -k https://<aem-host>:<port>/system/console/status-productinfoVerify Fix Applied:
Verify AEM version is 6.5.21 or later and test form fields for XSS vulnerabilities using security testing tools.📡 Detection & Monitoring
Log Indicators:
- Unusual form submissions with script tags
- Requests containing JavaScript payloads in form parameters
Network Indicators:
- HTTP requests with script tags in POST data
- Unusual content-type submissions to form endpoints
SIEM Query:
source="aem-access.log" AND ("<script" OR "javascript:" OR "onerror=" OR "onload=")