CVE-2025-46872: Adobe Experience Manager XSS Vulnerability

CVE-2025-46872 Overview

Adobe Experience Manager (AEM) versions 6.5.22 and earlier contain a stored Cross-Site Scripting (XSS) vulnerability tracked as CVE-2025-46872. A low-privileged authenticated attacker can inject malicious JavaScript into vulnerable form fields. The payload executes in the browser of any user who visits the affected page. The flaw is classified under [CWE-79] (Improper Neutralization of Input During Web Page Generation).

The issue affects both the on-premises AEM 6.5 product line and the AEM Cloud Service. Adobe published fixes in security bulletin APSB25-48. Successful exploitation requires user interaction and can lead to session compromise, credential theft, or unauthorized actions within the AEM author environment.

Critical Impact

Authenticated attackers can persist JavaScript payloads in AEM form fields, hijacking sessions of authors and content editors who view the affected pages.

Affected Products

• Adobe Experience Manager 6.5.22 and earlier (on-premises)
• Adobe Experience Manager Cloud Service (AEM as a Cloud Service)
• AEM authoring environments exposing user-editable form components

Discovery Timeline

• 2025-06-10 - CVE-2025-46872 published to the National Vulnerability Database
• 2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-46872

Vulnerability Analysis

CVE-2025-46872 is a stored Cross-Site Scripting flaw in Adobe Experience Manager form components. AEM fails to properly neutralize script content submitted through certain form fields before rendering it back to users. When an authenticated attacker with content authoring privileges inputs a crafted payload, the server stores the malicious markup within the repository.

The payload is later served as part of legitimate page content. A victim browsing the affected page triggers execution of attacker-controlled JavaScript in the context of the AEM origin. Because the attack requires only low privileges and user interaction, it fits scenarios where multiple authors share a workspace or where public-facing forms echo values into administrative dashboards.

Root Cause

The root cause is missing or insufficient output encoding on data written to vulnerable form fields. AEM does not consistently apply HTML or JavaScript context-aware escaping when rendering stored field values. Content stored in the JCR repository is trusted at render time, allowing embedded <script> tags or event handler attributes to reach the browser intact.

Attack Vector

An attacker authenticates to AEM with a low-privilege account that has content contribution rights. The attacker submits a form or edits a component field containing a JavaScript payload. When any user, including higher-privileged administrators, navigates to the page containing the field, the browser parses and executes the injected script. The scope change extends impact to other applications sharing the AEM origin or session context.

No verified public exploit code is available. Refer to the Adobe Security Advisory APSB25-48 for vendor-provided technical context.

Detection Methods for CVE-2025-46872

Indicators of Compromise

• Form field values in the JCR repository containing <script>, javascript:, or DOM event handler attributes such as onerror= and onload=
• Unexpected outbound requests from author or publish instances to attacker-controlled domains following page rendering
• AEM audit log entries showing content modifications by low-privileged users on components that render into shared pages
• Browser console errors or Content Security Policy violations logged when authors load affected pages

Detection Strategies

• Scan the JCR repository for stored property values containing HTML tags or JavaScript URI schemes in fields that should hold plain text
• Enable and review AEM Dispatcher and access logs for anomalous POST requests to /content/** endpoints from non-administrative accounts
• Correlate content modification events with subsequent page views by privileged users to identify potential victim sessions

Monitoring Recommendations

• Deploy a strict Content Security Policy on AEM author and publish instances to block inline script execution and report violations
• Monitor authoring activity for unusual editing patterns from low-privileged accounts, particularly bulk edits to form components
• Alert on newly created or modified pages that contain script-like content in text properties

How to Mitigate CVE-2025-46872

Immediate Actions Required

• Apply the security updates listed in Adobe bulletin APSB25-48 to all AEM 6.5.x on-premises deployments
• Confirm AEM as a Cloud Service tenants are running the patched release channel
• Audit user accounts with content authoring privileges and remove unnecessary access
• Review recent content changes for injected scripts and remediate affected pages

Patch Information

Adobe released fixed versions addressing CVE-2025-46872 alongside bulletin APSB25-48. Upgrade AEM 6.5 on-premises to the version specified in the advisory. AEM as a Cloud Service customers receive the fix through the managed release pipeline.

Workarounds

• Restrict form component usage to trusted authors until patches are applied
• Configure the AEM Dispatcher to filter suspicious characters in submitted form data
• Deploy a Content Security Policy header that disallows inline scripts on AEM-rendered pages
• Enable input validation rules on custom form components to reject HTML markup in text-only fields

# Example Content Security Policy header for AEM Dispatcher
Header always set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'self'"