CVE-2024-26093
📋 TL;DR
This reflected Cross-Site Scripting (XSS) vulnerability in Adobe Experience Manager allows attackers to execute malicious JavaScript in victims' browsers by tricking them into visiting specially crafted URLs. It affects Adobe Experience Manager versions 6.5.20 and earlier. The vulnerability requires user interaction but can lead to session hijacking, data theft, or further attacks.
💻 Affected Systems
- Adobe Experience Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attacker steals administrator session cookies, gains full control of the AEM instance, and uses it as a foothold for lateral movement within the network.
Likely Case
Attacker steals user session cookies to impersonate legitimate users, potentially accessing sensitive content or performing unauthorized actions.
If Mitigated
With proper input validation and output encoding, the attack fails to execute malicious scripts, limiting impact to failed exploitation attempts.
🎯 Exploit Status
Reflected XSS typically has low exploitation complexity but requires social engineering to deliver malicious URLs.
🛠️ 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 upgrade documentation. 3. Restart the AEM instance. 4. Verify the update was successful.
🔧 Temporary Workarounds
Input Validation Filter
allImplement custom servlet filters to sanitize user input and reject malicious payloads.
Content Security Policy
allImplement strict Content Security Policy headers to restrict script execution.
🧯 If You Can't Patch
- Implement Web Application Firewall (WAF) rules to block XSS payloads
- Educate users about phishing risks and suspicious URLs
🔍 How to Verify
Check if Vulnerable:
Check AEM version via CRXDE Lite or system console. If version is 6.5.20 or earlier, system is vulnerable.Check Version:
curl -u admin:password http://localhost:4502/system/console/status-productinfo.json | grep versionVerify Fix Applied:
After patching, verify version is 6.5.21 or later and test with safe XSS payloads to confirm mitigation.📡 Detection & Monitoring
Log Indicators:
- Unusual URL parameters containing script tags or JavaScript payloads
- Multiple failed login attempts following suspicious URL access
Network Indicators:
- HTTP requests with encoded script tags in query parameters
- Outbound connections to suspicious domains following AEM access
SIEM Query:
source="aem-access.log" AND (uri="*<script*" OR uri="*javascript:*" OR uri="*onerror=*" OR uri="*onload=*")