CVE-2025-46959: Adobe Experience Manager XSS Vulnerability

CVE-2025-46959 Overview

CVE-2025-46959 is a DOM-based Cross-Site Scripting (XSS) vulnerability affecting Adobe Experience Manager (AEM) versions 6.5.22 and earlier, as well as the Cloud Service release. A low-privileged attacker can manipulate the Document Object Model (DOM) to execute arbitrary JavaScript in a victim's browser session. Exploitation requires user interaction, specifically that a victim visit a specially crafted web page. The vulnerability is classified under [CWE-79] (Improper Neutralization of Input During Web Page Generation).

Critical Impact
Successful exploitation allows attackers to execute JavaScript in the victim's browser, potentially leading to session token theft, unauthorized actions performed as the victim, and data leakage within the AEM application context.

Affected Products

Adobe Experience Manager 6.5.22 and earlier (on-premises)
Adobe Experience Manager Cloud Service
AEM deployments exposing vulnerable client-side components

Discovery Timeline

2025-07-16 - CVE-2025-46959 published to the National Vulnerability Database
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-46959

Vulnerability Analysis

The vulnerability resides in client-side JavaScript within Adobe Experience Manager that processes untrusted data and writes it into the DOM without adequate sanitization. Unlike reflected or stored XSS, DOM-based XSS executes entirely in the browser, so server-side filters do not observe or block the payload. The vulnerable sinks handle attacker-controlled input from sources such as URL fragments, query parameters, or document.location, then inject it into the page structure.

The attack scope is marked as changed, meaning JavaScript executed in the AEM origin can impact resources beyond the initial vulnerable component. This raises the practical risk for multi-tenant AEM instances and authoring environments where an attacker with content author permissions could pivot against higher-privileged editors.

Root Cause

The root cause is improper neutralization of user-controllable input written to a DOM sink. Client-side scripts pass unvalidated data into APIs such as innerHTML, document.write, or jQuery equivalents, allowing an attacker to embed executable markup. Adobe has not published sink-level technical details in the security bulletin.

Attack Vector

An authenticated attacker with low privileges crafts a URL or resource that, when opened by a victim in an AEM session, causes vulnerable client-side code to render attacker-supplied HTML or JavaScript. The victim must interact with the malicious link for the payload to trigger. See the Adobe Security Bulletin APSB25-48 for advisory details.

No public proof-of-concept exploit is currently available, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog.

Detection Methods for CVE-2025-46959

Indicators of Compromise

Unexpected <script> tags or JavaScript event handlers appearing in AEM-rendered pages or authored content
Outbound requests from browser sessions to attacker-controlled domains carrying session cookies or authentication tokens
Anomalous AEM author or publisher actions performed under legitimate user accounts shortly after clicking external links

Detection Strategies

Inspect web server and content delivery network logs for AEM URLs containing suspicious fragments, encoded HTML entities, or JavaScript keywords in query parameters
Deploy a strict Content Security Policy (CSP) in report-only mode to surface unauthorized inline script execution attempts
Use browser-side runtime monitoring or DAST scans that target DOM sinks such as innerHTML, eval, and document.write in AEM components

Monitoring Recommendations

Correlate AEM authentication events with unusual referrer URLs or short-lived sessions initiated from external phishing lures
Alert on new administrative actions performed immediately after a low-privileged user navigates to an untrusted URL
Forward AEM dispatcher and access logs to a centralized SIEM for retrospective hunting once patch status is confirmed

How to Mitigate CVE-2025-46959

Immediate Actions Required

Upgrade Adobe Experience Manager to a version later than 6.5.22 as directed in Adobe Security Bulletin APSB25-48
Confirm AEM Cloud Service tenants are running the patched release published by Adobe
Restrict AEM author interface access to trusted networks and enforce phishing-resistant multi-factor authentication for all content authors

Patch Information

Adobe released fixes for CVE-2025-46959 in the security update tracked as APSB25-48. Administrators should review the advisory to identify the specific service pack or Cloud Service release that remediates the DOM-based XSS and apply it across authoring, publishing, and dispatcher tiers.

Workarounds

Deploy a strict Content Security Policy that disallows inline scripts and restricts script sources to trusted origins
Configure the AEM Dispatcher to filter suspicious query parameters and URL fragments before they reach client-side code
Provide security awareness guidance to AEM users on avoiding untrusted links that target the AEM domain

bash

# Example Content Security Policy header for AEM responses
Content-Security-Policy: default-src 'self'; \
  script-src 'self'; \
  object-src 'none'; \
  base-uri 'self'; \
  frame-ancestors 'self'