CVE-2025-64840
📋 TL;DR
This stored Cross-Site Scripting (XSS) vulnerability in Adobe Experience Manager allows low-privileged attackers to inject malicious JavaScript into vulnerable form fields. When victims browse pages containing these compromised fields, their browsers execute the attacker's scripts. This affects AEM versions 6.5.23 and earlier.
💻 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 on victim systems.
Likely Case
Session hijacking, credential theft, defacement of web pages, or data exfiltration from user browsers.
If Mitigated
Limited impact with proper input validation, output encoding, and Content Security Policy (CSP) headers in place.
🎯 Exploit Status
Requires authenticated low-privileged access to inject payloads into vulnerable fields.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.5.24 or later
Vendor Advisory: https://helpx.adobe.com/security/products/experience-manager/apsb25-115.html
Restart Required: Yes
Instructions:
1. Download AEM 6.5.24 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 and Output Encoding
allImplement strict input validation and output encoding for all user-controllable form fields.
Content Security Policy
allImplement strict Content Security Policy headers to restrict script execution.
🧯 If You Can't Patch
- Restrict low-privileged user access to vulnerable form fields and components.
- Implement web application firewall (WAF) rules to block XSS payloads.
🔍 How to Verify
Check if Vulnerable:
Check AEM version via the Welcome screen or OSGi console. If version is 6.5.23 or earlier, the system is vulnerable.Check Version:
curl -s http://localhost:4502/libs/granite/core/content/login.html | grep 'AEM 6.5'Verify Fix Applied:
Verify AEM version is 6.5.24 or later and test form fields for XSS vulnerabilities using safe payloads.📡 Detection & Monitoring
Log Indicators:
- Unusual form submissions with script tags or JavaScript payloads
- Multiple failed XSS attempts in request logs
Network Indicators:
- HTTP requests containing script tags or JavaScript in form parameters
- Unexpected outbound connections from user browsers
SIEM Query:
source="aem_access.log" AND ("<script" OR "javascript:" OR "onerror=" OR "onload=")