CVE-2024-52848
📋 TL;DR
Adobe Experience Manager versions 6.5.21 and earlier contain a stored Cross-Site Scripting (XSS) vulnerability that allows attackers to inject malicious JavaScript into form fields. When users visit pages containing the compromised fields, their browsers execute the attacker's code. This affects organizations using vulnerable Adobe Experience Manager instances.
💻 Affected Systems
- Adobe Experience Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, redirect users to malicious sites, perform actions on behalf of authenticated users, or deploy additional malware payloads.
Likely Case
Session hijacking, credential theft, or defacement of web pages through injected content.
If Mitigated
Limited impact if proper input validation and output encoding are implemented, though the vulnerability still exists.
🎯 Exploit Status
Exploitation requires the attacker to have access to inject content into vulnerable form fields, which typically requires some level of access or social engineering.
🛠️ 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 official distribution. 2. Follow Adobe's upgrade documentation for your deployment type (on-premise or cloud). 3. Apply the update to all affected instances. 4. Restart the AEM service. 5. Verify the update was successful.
🔧 Temporary Workarounds
Input Validation and Output Encoding
allImplement strict input validation and output encoding for all form fields to prevent XSS payloads from executing.
Content Security Policy (CSP)
allDeploy a strict Content Security Policy header to restrict script execution sources.
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block XSS payload patterns.
- Restrict access to vulnerable form fields to trusted users only and monitor for suspicious input.
🔍 How to Verify
Check if Vulnerable:
Check the AEM version via the AEM welcome screen or by examining the CRX package manager. Versions 6.5.21 or earlier are vulnerable.Check Version:
Check the AEM welcome page at http://<aem-host>:<port>/ or use the CRX package manager interface.Verify Fix Applied:
After patching, verify the version is 6.5.22 or later and test form fields for XSS by attempting to inject basic script payloads (in a controlled manner).📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to form submission endpoints containing script tags or JavaScript code
- Errors from input validation failures
Network Indicators:
- HTTP requests with suspicious parameters containing script elements or encoded payloads
SIEM Query:
source="aem_access.log" AND ("<script" OR "javascript:" OR "onerror=" OR "onload=")