CVE-2024-43745
📋 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. The vulnerability affects Adobe Experience Manager versions 6.5.21 and earlier, potentially compromising user sessions and data.
💻 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 through drive-by downloads.
Likely Case
Session hijacking, credential theft, or defacement of the application interface through injected content.
If Mitigated
Limited impact with proper input validation, output encoding, and Content Security Policy (CSP) headers in place.
🎯 Exploit Status
Reflected XSS typically requires social engineering to trick users into clicking malicious links.
🛠️ 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. Download Adobe Experience Manager 6.5.22 or later from Adobe's distribution portal. 2. Apply the service pack following Adobe's upgrade documentation. 3. Restart all AEM instances. 4. Verify the fix by testing previously vulnerable endpoints.
🔧 Temporary Workarounds
Implement Content Security Policy
allAdd CSP headers to restrict script execution sources and mitigate XSS impact
Add 'Content-Security-Policy' header with appropriate directives in web server configuration
Input Validation Filter
allDeploy a web application firewall or input validation filter to block malicious payloads
Configure WAF rules to detect and block XSS patterns in URL parameters
🧯 If You Can't Patch
- Implement strict input validation and output encoding on all user-controllable inputs
- Deploy a web application firewall (WAF) with XSS protection rules enabled
🔍 How to Verify
Check if Vulnerable:
Test URL parameters with XSS payloads like <script>alert('XSS')</script> and check if they execute in browserCheck Version:
Check AEM version via CRXDE Lite interface or system/console/status-productinfo endpointVerify Fix Applied:
After patching, retest with XSS payloads to confirm they are properly sanitized or blocked📡 Detection & Monitoring
Log Indicators:
- Unusual URL parameters containing script tags or JavaScript code
- Multiple failed XSS attempts from same source
Network Indicators:
- HTTP requests with suspicious parameters containing script elements or encoded payloads
SIEM Query:
web.url:*<script* OR web.url:*javascript:* OR web.url:*%3Cscript%3E*