CVE-2025-46859
📋 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 fields, their browsers execute the attacker's scripts. This affects AEM versions 6.5.22 and earlier.
💻 Affected Systems
- Adobe Experience Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator credentials, hijack user sessions, deface websites, or redirect users to malicious sites, potentially leading to complete system compromise.
Likely Case
Attackers with low privileges steal session cookies or credentials from users who view the compromised pages, enabling lateral movement or data theft.
If Mitigated
With proper input validation and output encoding, the vulnerability would be prevented, though the underlying code flaw remains.
🎯 Exploit Status
Exploitation requires authenticated low-privileged access; stored XSS is typically straightforward to exploit once vulnerable fields are identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.5.23 or later
Vendor Advisory: https://helpx.adobe.com/security/products/experience-manager/apsb25-48.html
Restart Required: Yes
Instructions:
1. Download AEM 6.5.23 or later from Adobe's distribution portal. 2. Apply the service pack following Adobe's installation guide. 3. Restart the AEM instance. 4. Verify the update completed successfully.
🔧 Temporary Workarounds
Input Validation and Output Encoding
allImplement strict input validation and output encoding for all user-controllable form fields to prevent script injection.
Implement server-side validation using AEM's XSS API (org.apache.sling.xss.XSSAPI) for all user inputs.
Content Security Policy (CSP)
allDeploy a strict Content Security Policy to mitigate the impact of successful XSS attacks.
Add 'Content-Security-Policy' header with script-src directives restricting JavaScript execution.
🧯 If You Can't Patch
- Restrict low-privileged user access to form creation and editing capabilities.
- Implement web application firewall (WAF) rules to block common XSS payloads.
🔍 How to Verify
Check if Vulnerable:
Check AEM version via the Welcome screen or CRXDE Lite; versions 6.5.22 or earlier are vulnerable.Check Version:
Navigate to AEM Welcome screen (http://<host>:<port>/welcome.html) or use CRXDE Lite to check version details.Verify Fix Applied:
Confirm AEM version is 6.5.23 or later and test form fields with XSS payloads to ensure they're properly sanitized.📡 Detection & Monitoring
Log Indicators:
- Unusual form submissions containing script tags or JavaScript code in request parameters.
- Multiple failed login attempts following suspicious form submissions.
Network Indicators:
- HTTP requests containing <script> tags or JavaScript in POST parameters to AEM form endpoints.
SIEM Query:
source="aem_access.log" AND ("<script>" OR "javascript:" OR "onerror=" OR "onload=")