CVE-2025-46953: Adobe Experience Manager XSS Vulnerability

CVE-2025-46953 Overview

Adobe Experience Manager (AEM) versions 6.5.22 and earlier contain a stored Cross-Site Scripting (XSS) vulnerability tracked as CVE-2025-46953. A low-privileged authenticated attacker can inject malicious JavaScript into vulnerable form fields. The payload executes in a victim's browser when they load the page containing the affected field. The scope is changed, meaning the impact extends beyond the vulnerable component to other resources in the browser context. Adobe published the fix in security advisory APSB25-48. The vulnerability is classified as [CWE-79] Improper Neutralization of Input During Web Page Generation.

Critical Impact
Authenticated attackers can persist malicious scripts in AEM form fields, executing arbitrary JavaScript in the browsers of any user who views the affected content.

Affected Products

Adobe Experience Manager 6.5.22 and earlier (on-premises)
Adobe Experience Manager Cloud Service
Adobe Experience Manager forms authoring components

Discovery Timeline

2025-06-10 - CVE-2025-46953 published to the National Vulnerability Database
2025-06-10 - Adobe publishes security bulletin APSB25-48
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-46953

Vulnerability Analysis

The flaw is a stored XSS defect in Adobe Experience Manager form field handling. AEM accepts user-supplied input into form fields and later renders it into HTML without sufficient neutralization of active content. Because the payload is persisted server-side, it triggers automatically for every user who subsequently loads the affected page. The changed scope indicates that JavaScript executed through the vulnerable component can access resources under the origin of the rendering page, including session cookies and DOM data outside the original vulnerable field. Exploitation requires the attacker to hold a low-privileged account and requires a victim to visit the page containing the injected payload.

Root Cause

The root cause is improper output encoding of user-controlled form field content during page rendering. AEM stores attacker-supplied markup verbatim and reflects it into the DOM without HTML entity encoding or a strict content sanitization pass. As a result, <script> tags, event handlers, and other active-content constructs are interpreted by the browser rather than rendered as text.

Attack Vector

An authenticated attacker with basic content authoring or form submission privileges submits a crafted payload into a vulnerable AEM form field. The payload is persisted in the AEM repository. When a legitimate user, including administrators, navigates to the page rendering that field, the browser executes the injected script under the AEM site origin. Attackers commonly use this class of flaw to steal session tokens, perform actions on behalf of the victim, or pivot to further internal resources.

Because no verified public exploit code has been released, this article does not include a proof-of-concept payload. Refer to the Adobe Security Advisory APSB25-48 for vendor technical details.

Detection Methods for CVE-2025-46953

Indicators of Compromise

Form field values in the AEM Java Content Repository (JCR) containing <script>, javascript:, onerror=, onload=, or encoded variants such as <script>.
Outbound requests from browsers rendering AEM pages to unfamiliar domains that correlate with viewing form-authored content.
Unexpected session activity or administrative actions originating from AEM author or publish user sessions shortly after page loads.

Detection Strategies

Audit persisted AEM form field content for HTML tags, event-handler attributes, and script-like payloads across cq:PageContent and form component nodes.
Monitor AEM access logs for authenticated POST requests to form endpoints that submit content containing HTML control characters.
Correlate Content Security Policy (CSP) violation reports from the AEM publish tier with the affected pages to surface injection attempts.

Monitoring Recommendations

Enable and forward AEM audit logs and Dispatcher access logs to a centralized analytics platform for continuous review.
Track privileged user activity, especially form and template modifications, and alert on anomalous edits by low-privileged accounts.
Deploy web application firewall (WAF) rules that flag script tags and JavaScript URI schemes submitted to AEM form endpoints.

How to Mitigate CVE-2025-46953

Immediate Actions Required

Upgrade Adobe Experience Manager on-premises deployments to a version later than 6.5.22 as directed by Adobe Security Advisory APSB25-48.
Confirm that AEM Cloud Service instances are running the current release, which incorporates the fix.
Review and remove any suspicious HTML or script content already stored in form field nodes across author and publish tiers.
Rotate session credentials for users who may have loaded affected pages during the exposure window.

Patch Information

Adobe addressed CVE-2025-46953 in the June 2025 security update for Adobe Experience Manager, published as bulletin APSB25-48. The advisory lists the fixed on-premises Service Pack and confirms that Adobe Experience Manager Cloud Service receives the fix through the standard Cloud Manager release cycle. Apply the update to both author and publish instances, then invalidate cached pages to remove any previously injected content.

Workarounds

Restrict form authoring and content submission privileges to trusted user groups until the patch is applied.
Enforce a strict Content Security Policy on AEM publish domains that blocks inline scripts and limits script sources.
Deploy WAF signatures at the Dispatcher tier to strip or reject HTML control characters in form field submissions.

bash

# Example Dispatcher filter to block obvious script payloads in form POSTs
/0100 { /type "deny" /method "POST" /url "*/content/*" /query ".*(<script|javascript:|onerror=).*" }