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How CVE-2025-46843 Works
Adobe Experience Manager (AEM) versions 6.5.22 and earlier fail to properly sanitize user-supplied input in form fields, allowing attackers with low privileges to inject malicious JavaScript. When a victim accesses a compromised page, the script executes in their browser, potentially leading to session hijacking, data theft, or unauthorized actions. The vulnerability stems from insufficient input validation in the Granite UI components, where payloads persist in the database and render without escaping.
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Platform: Adobe Experience Manager
Version: ≤ 6.5.22
Vulnerability: Stored XSS
Severity: Critical
Date: 06/13/2025
Prediction: Patch expected by 07/15/2025
What Undercode Say:
Exploitation
1. Payload Injection:
<script>alert(document.cookie)</script>
Inserted into vulnerable form fields (e.g., comments, user profiles).
2. Persistence:
Malicious scripts save to AEM’s JCR repository.
3. Execution:
Victims trigger payloads when loading affected pages.
Protection
1. Input Sanitization:
// OWASP Java HTML Sanitizer PolicyFactory policy = new HtmlPolicyBuilder().toFactory(); String safeInput = policy.sanitize(userInput);
2. CSP Header:
Content-Security-Policy: default-src 'self'; script-src 'unsafe-inline' 'unsafe-eval'
3. Patch Verification:
aemcli --version | grep "6.5.23"
4. Mitigation (Pre-Patch):
<!-- Disable risky components --> /apps/granite/config.xml -> <disableXSS>true</disableXSS>
5. Log Monitoring:
tail -f /var/log/aem/error.log | grep "XSS"
6. Exploit Detection:
import re
xss_pattern = re.compile(r"<script.?>.?</script>", re.IGNORECASE)
if xss_pattern.search(content):
print("XSS detected!")
7. AEM WCM Filters:
Enable built-in XSS filters via OSGi console:
curl -u admin:password -X POST -d "apply=true" http://localhost:4502/system/console/configMgr/com.adobe.granite.xss.impl.XSSFilterImpl
8. Emergency Workaround:
UPDATE jcr:content SET data = REPLACE(data, '<script', '<!-- blocked -->') WHERE path LIKE '%form%';
9. Scanner Command:
nuclei -t xss -u https://aem-instance/content/forms
10. Patch Rollback Test:
aemcli rollback --verify --cve CVE-2025-46843
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
