Adobe Experience Manager, Stored Cross-Site Scripting (XSS), CVE-2025-46883 (Critical)

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How CVE-2025-46883 Works

The vulnerability exists in Adobe Experience Manager (AEM) versions 6.5.22 and earlier due to insufficient input sanitization in form fields. Attackers with contributor-level privileges can inject malicious JavaScript payloads into stored content through vulnerable input fields. When authenticated users access pages containing the compromised content, the scripts execute within their browser session, potentially allowing session hijacking, administrative actions, or data theft. The attack persists until the malicious content is removed, affecting all users who view the tainted page.

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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:

// Basic PoC for CVE-2025-46883
POST /content/forms/af/vulnerable-form.html HTTP/1.1
Host: target-aem
Content-Type: application/x-www-form-urlencoded
fieldname=<script>alert(document.cookie)</script>

Detection:

Check AEM version
curl -s http://aem-instance/system/console/status-productinfo | grep "Adobe Experience Manager"

Mitigation:

1. Immediate workaround:

<!-- Disable rich text editor for vulnerable components -->
<config xmlns:jcr="http://www.jcp.org/jcr/1.0"
jcr:primaryType="nt:unstructured"
useFixedInlineToolbar="{Boolean}true"
disallowedFeatures="['script']"/>

2. Input validation filter:

@SlingFilter(scope = SlingFilterScope.REQUEST)
public class XSSFilter implements Filter {
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain)
throws IOException, ServletException {
String value = req.getParameter("fieldname");
if (value != null && value.matches(".<script.>.")) {
throw new ServletException("XSS attempt blocked");
}
chain.doFilter(req, res);
}
}

Analytics:

  • Attack Vector: Network
  • Complexity: Low
  • Privileges Required: Low
  • User Interaction: Required
  • Scope: Changed
  • Confidentiality Impact: High
  • Integrity Impact: High
  • Availability Impact: Medium

Post-Patch Verification:

Verify patch installation
java -jar aem-quickstart.jar -v | grep "6.5.23"

Emergency Containment:

Apache .htaccess temporary fix
RewriteCond %{QUERY_STRING} (\<|%3C).script.(>|%3E) [NC,OR]
RewriteRule ^.$ - [F,L]

Sources:

Reported By: nvd.nist.gov
Extra Source Hub:
Undercode

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