CVE-2025-46904: Adobe Experience Manager XSS Vulnerability

CVE-2025-46904 Overview

Adobe Experience Manager (AEM) versions 6.5.22 and earlier contain a stored Cross-Site Scripting (XSS) vulnerability [CWE-79] in form field handling. A low-privileged authenticated attacker can inject malicious JavaScript into vulnerable form fields. The injected script executes in the browser of any victim who visits the page containing the compromised field.

The flaw affects both on-premises Adobe Experience Manager deployments and AEM Cloud Service. Exploitation requires user interaction and low privileges, but the scope changes from the vulnerable component to the victim's browser context.

Critical Impact
Attackers with low-privileged AEM accounts can execute arbitrary JavaScript in victims' browsers, enabling session theft, credential harvesting, and unauthorized actions within the AEM interface.

Affected Products

Adobe Experience Manager 6.5.22 and earlier (on-premises)
Adobe Experience Manager Cloud Service
AEM form field components affected by improper input sanitization

Discovery Timeline

2025-06-10 - CVE-2025-46904 published to the National Vulnerability Database (NVD)
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-46904

Vulnerability Analysis

The vulnerability is a stored Cross-Site Scripting flaw classified under [CWE-79]. AEM form fields fail to properly neutralize user-supplied input before storing and rendering it in the page. When another user loads the affected page, the browser interprets the stored payload as executable JavaScript.

Exploitation requires an authenticated session with low privileges, such as a content contributor or form editor role. Because the injected payload persists in AEM's content repository, every subsequent viewer of the affected page becomes a target. The scope change indicates that the injected script executes in a security context different from the vulnerable component.

Root Cause

The root cause is improper output encoding and input sanitization within specific form field components in Adobe Experience Manager. User-controlled input is stored in the Java Content Repository (JCR) and later rendered without adequate HTML entity encoding or context-aware escaping. This allows raw <script> tags and event-handler attributes to survive the render pipeline.

Attack Vector

An attacker with a low-privileged AEM account authors or edits a form and inserts a JavaScript payload into a vulnerable field. The payload is saved to the AEM repository. When a legitimate user, including higher-privileged administrators, navigates to the page containing the field, the browser executes the attacker-supplied script.

Potential post-exploitation activity includes stealing authentication cookies, capturing CSRF tokens, initiating requests on behalf of the victim, redirecting users to attacker-controlled infrastructure, and modifying rendered content. Refer to the Adobe Security Advisory APSB25-48 for vendor-specific technical detail.

Detection Methods for CVE-2025-46904

Indicators of Compromise

Form field content in the JCR containing <script>, javascript:, onerror=, onload=, or similar event-handler attributes.
Unexpected outbound requests from user browsers to unknown domains following visits to AEM-authored pages.
Authoring or modification of form components by low-privileged accounts outside normal business hours.
New or modified form fields containing base64-encoded strings, HTML entity encodings of script tags, or unusual Unicode escape sequences.

Detection Strategies

Audit AEM content repository entries for form field values containing HTML tags or JavaScript syntax using JCR queries.
Review AEM audit logs for form component modifications by non-administrative users.
Deploy Content Security Policy (CSP) reporting to identify script execution violations in AEM-served pages.
Correlate authoring activity with subsequent anomalous session behavior for accounts that viewed the modified pages.

Monitoring Recommendations

Enable verbose audit logging for cq:Page and form component node modifications in AEM.
Forward AEM access and audit logs to a centralized SIEM for correlation with browser-side telemetry.
Monitor for privilege escalation patterns following successful XSS delivery, such as new admin account creation.
Alert on outbound requests from authoring instances to non-approved destinations.

How to Mitigate CVE-2025-46904

Immediate Actions Required

Apply the Adobe security update referenced in APSB25-48 to all AEM 6.5.x deployments.
Verify AEM Cloud Service instances have received the vendor-managed patch.
Review and restrict form authoring privileges to trusted personnel only.
Audit existing form field content across all sites for suspicious payloads before patching.

Patch Information

Adobe released fixes in the security bulletin APSB25-48 covering Adobe Experience Manager 6.5.22 and earlier. Administrators should upgrade to AEM 6.5.23 or later. AEM Cloud Service customers receive the fix through Adobe's managed release channel. Validate the deployed version using the AEM Web Console after patching.

Workarounds

Restrict form authoring and editing permissions to a minimal set of trusted users until the patch is applied.
Implement a strict Content Security Policy (CSP) that disallows inline scripts on AEM-published pages.
Deploy a web application firewall (WAF) rule to inspect and block XSS payloads submitted to AEM form endpoints.
Sanitize existing form field content by removing HTML tags and JavaScript event handlers from stored values.

bash

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