CVE-2025-46936: Adobe Experience Manager XSS Vulnerability

CVE-2025-46936 Overview

CVE-2025-46936 is a stored Cross-Site Scripting (XSS) vulnerability affecting Adobe Experience Manager (AEM) versions 6.5.22 and earlier, as well as AEM Cloud Service. A low-privileged attacker can inject malicious JavaScript into vulnerable form fields. The injected script executes in a victim's browser when the victim loads a page containing the affected field. Adobe addressed the issue in security bulletin APSB25-48. The flaw is classified under CWE-79 (Improper Neutralization of Input During Web Page Generation). Exploitation requires user interaction and authenticated access, but the scope change extends impact beyond the vulnerable component.

Critical Impact
Authenticated attackers can execute arbitrary JavaScript in the browsers of AEM users, enabling session theft, credential harvesting, and unauthorized actions performed as the victim.

Affected Products

Adobe Experience Manager 6.5.22 and earlier (on-premises)
Adobe Experience Manager Cloud Service
Any AEM deployment exposing form field authoring to low-privileged users

Discovery Timeline

2025-08-20 - CVE-2025-46936 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-46936

Vulnerability Analysis

The vulnerability is a stored XSS flaw in Adobe Experience Manager's form field handling. AEM fails to properly neutralize user-supplied input before persisting it to the content repository and rendering it in downstream pages. When an authenticated author with limited privileges submits crafted input containing JavaScript payloads, the content is stored without adequate sanitization. Any user who later browses to a page containing the affected field executes the attacker-controlled script in the context of the AEM origin.

Because the payload persists server-side, exploitation does not require phishing links or per-victim delivery. The CVSS vector indicates a scope change, meaning the compromise extends beyond the vulnerable component to affect other users of the AEM site.

Root Cause

The root cause is missing or insufficient output encoding when AEM renders form field values back to the browser. Input accepted through form authoring interfaces is stored in the Java Content Repository (JCR) and later inserted into HTML responses without contextual escaping. This allows <script> tags and event handlers to survive persistence and reach the rendered DOM.

Attack Vector

An attacker with low-privileged authoring or content-editor access submits a JavaScript payload through a vulnerable form field. The malicious markup is stored in the AEM repository. When any user, including higher-privileged administrators, navigates to a page that renders the field, the browser parses and executes the script. This can lead to session token theft, forced administrative actions via CSRF-like abuse of the victim's session, and further pivot within the AEM administrative interface.

No verified public proof-of-concept exploit code is available. Refer to the Adobe Security Bulletin APSB25-48 for vendor guidance.

Detection Methods for CVE-2025-46936

Indicators of Compromise

Form field content in the JCR containing <script>, javascript:, onerror=, onload=, or other HTML event handler attributes
Unexpected outbound HTTP requests from AEM author or publish instance browsers to attacker-controlled domains
Anomalous administrative actions in AEM audit logs performed by high-privileged users shortly after visiting content-editing pages

Detection Strategies

Audit stored content in AEM repositories for HTML or JavaScript patterns in fields that should contain plain text
Review AEM access logs for authoring activity from low-privileged accounts modifying shared or high-visibility components
Correlate browser-side security violations (Content Security Policy reports) with AEM page requests to surface active XSS attempts

Monitoring Recommendations

Enable and centralize AEM audit logging for content modifications and privilege changes
Deploy a strict Content Security Policy on AEM-served pages and forward CSP violation reports to a SIEM
Monitor privileged AEM accounts for session anomalies, unusual IP addresses, and unexpected content publish events

How to Mitigate CVE-2025-46936

Immediate Actions Required

Apply the Adobe security update referenced in APSB25-48 to all AEM 6.5.x instances
Verify AEM Cloud Service instances have received the vendor-managed patch
Review authoring account inventory and revoke unused or over-privileged content-editor accounts
Audit existing form field content for previously injected payloads

Patch Information

Adobe released fixes for CVE-2025-46936 in the AEM 6.5 Service Pack referenced by security bulletin APSB25-48. Administrators of on-premises AEM 6.5.22 and earlier must upgrade to the patched service pack. AEM Cloud Service customers receive updates through Adobe's managed release channel.

Workarounds

Restrict authoring privileges so that only trusted users can edit form components until the patch is applied
Deploy a Content Security Policy that disallows inline scripts on AEM-rendered pages to blunt XSS payload execution
Place a web application firewall in front of the AEM author instance with rules to block HTML and JavaScript payloads in form field submissions

bash

# Example CSP header to reduce stored XSS impact on AEM pages
add_header Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'self'";