CVE-2024-41848
📋 TL;DR
This CVE describes a reflected Cross-Site Scripting (XSS) vulnerability in Adobe Experience Manager versions 6.5.20 and earlier. An attacker can craft a malicious URL that, when visited by a victim, executes arbitrary JavaScript in the victim's browser session. Organizations using affected Adobe Experience Manager versions are at risk.
💻 Affected Systems
- Adobe Experience Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An attacker could steal session cookies, perform actions as the authenticated user, redirect to malicious sites, or install malware through the victim's browser.
Likely Case
Attackers would typically use this to steal session tokens or credentials, potentially leading to account takeover and unauthorized access to the AEM system.
If Mitigated
With proper input validation and output encoding, the vulnerability would be prevented, and with web application firewalls, malicious requests could be blocked.
🎯 Exploit Status
Reflected XSS vulnerabilities typically have low exploitation complexity as they only require crafting a malicious URL and social engineering to get victims to click it.
🛠️ 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 instructions. 3. Restart the AEM instance. 4. Verify the update was successful.
🔧 Temporary Workarounds
Web Application Firewall (WAF) Rules
allConfigure WAF rules to block requests containing suspicious script patterns or malicious payloads targeting the vulnerable endpoints.
Input Validation Filters
allImplement custom servlet filters or dispatcher rules to sanitize and validate user input before processing.
🧯 If You Can't Patch
- Implement strict Content Security Policy (CSP) headers to limit script execution
- Use network segmentation to restrict access to AEM instances and monitor for suspicious URL patterns
🔍 How to Verify
Check if Vulnerable:
Check the AEM version via the welcome page or system console. If version is 6.5.20 or earlier, the system is vulnerable.Check Version:
Navigate to /system/console/status-productinfo in your AEM instance or check the welcome pageVerify Fix Applied:
After patching, verify the version shows 6.5.21 or later and test the previously vulnerable endpoints with XSS payloads to confirm they're blocked.📡 Detection & Monitoring
Log Indicators:
- Unusual URL parameters containing script tags or JavaScript code in access logs
- Multiple failed attempts to access vulnerable endpoints with suspicious parameters
Network Indicators:
- HTTP requests containing <script> tags or JavaScript code in URL parameters
- Unusual redirects from AEM pages to external domains
SIEM Query:
source="aem_access.log" AND (url="*<script>*" OR url="*javascript:*" OR url="*onerror=*" OR url="*onload=*")