CVE-2024-53963
📋 TL;DR
This DOM-based XSS vulnerability in Adobe Experience Manager allows low-privileged attackers to execute arbitrary JavaScript in victims' browsers by manipulating URLs or user input. Users of Adobe Experience Manager versions 6.5.21 and earlier are affected. The attack requires user interaction, such as clicking a malicious link.
💻 Affected Systems
- Adobe Experience Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attacker steals session cookies, performs actions as the victim user, and potentially compromises the entire AEM instance through privilege escalation.
Likely Case
Session hijacking, credential theft, or defacement of AEM content pages through injected scripts.
If Mitigated
Limited impact due to same-origin policy restrictions and user interaction requirement, with potential for minor data leakage.
🎯 Exploit Status
Exploitation requires low-privileged access and user interaction via crafted URLs or input.
🛠️ 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 AEM 6.5.22 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 URL parameters before processing.
Implement Java servlet filter with input sanitization logic
Content Security Policy
allDeploy strict CSP headers to restrict script execution sources.
Add 'Content-Security-Policy' header with script-src directives
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block XSS payloads in URLs and parameters.
- Restrict low-privileged user access to content authoring and administrative interfaces.
🔍 How to Verify
Check if Vulnerable:
Check AEM version via CRXDE Lite or system console. If version is 6.5.21 or earlier, system is vulnerable.Check Version:
curl -u admin:password http://localhost:4502/system/console/status-productinfoVerify Fix Applied:
Verify AEM version is 6.5.22 or later and test XSS payloads in user input fields and URL parameters.📡 Detection & Monitoring
Log Indicators:
- Unusual URL parameters with script tags or JavaScript code
- Multiple failed XSS attempts in request logs
Network Indicators:
- HTTP requests containing script tags in parameters
- Unusual redirect patterns
SIEM Query:
source="aem_access.log" AND ("<script" OR "javascript:" OR "onerror=" OR "onload=")