CVE-2025-46989: Adobe Experience Manager XSS Vulnerability

CVE-2025-46989 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 payload executes in a victim's browser when they access the page containing the tainted field.

The flaw affects both on-premise AEM 6.5.x deployments and AEM Cloud Service. Exploitation requires attacker authentication and victim interaction, limiting the attack scope. Adobe published fixes in security advisory APSB25-48.

Critical Impact
Authenticated attackers can execute arbitrary JavaScript in victim browsers, enabling session theft, credential harvesting, and unauthorized actions performed under the victim's identity within AEM.

Affected Products

Adobe Experience Manager 6.5.22 and earlier
Adobe Experience Manager Cloud Service (AEM CS)
AEM Sites and Forms components exposing vulnerable field inputs

Discovery Timeline

2025-06-10 - CVE-2025-46989 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-46989

Vulnerability Analysis

The vulnerability is a stored XSS flaw in Adobe Experience Manager form field processing. Server-side code accepts user-supplied input into form fields without sufficient output encoding. The injected script persists in the AEM content repository and executes each time a user renders the affected page.

Because the payload is stored, the attack does not require crafted links or phishing lures. Any user who visits the affected page automatically triggers the malicious script. The changed scope in the CVSS vector reflects that the injected script executes in the context of the AEM origin, potentially reaching resources beyond the vulnerable component.

Stored XSS in a content management system such as AEM is particularly consequential. Administrative users frequently browse authored content, and their sessions carry elevated privileges within the platform.

Root Cause

The root cause is improper neutralization of input during web page generation [CWE-79]. AEM renders attacker-controlled form field values into HTML output without applying context-aware encoding. Special characters such as <, >, and quotation marks are preserved verbatim, allowing script tags and event handler attributes to break out of the intended data context.

Attack Vector

An authenticated attacker with low privileges submits a payload containing JavaScript into a vulnerable form field. AEM stores the payload in its Java Content Repository (JCR). When a victim, typically an authenticated author or reviewer, navigates to a page that renders the field, the browser parses and executes the embedded script. The attacker can then exfiltrate session tokens, call authenticated AEM APIs, or modify content on behalf of the victim.

No public proof-of-concept exploit code is available for this vulnerability. Refer to the Adobe Security Advisory APSB25-48 for vendor-provided technical details.

Detection Methods for CVE-2025-46989

Indicators of Compromise

Form field values in the JCR containing <script> tags, javascript: URIs, or DOM event handlers such as onerror, onload, or onmouseover
Unexpected outbound HTTP requests from author browser sessions to attacker-controlled domains carrying session cookies or CSRF tokens
AEM audit log entries showing form submissions from low-privileged accounts immediately followed by content modifications by higher-privileged users

Detection Strategies

Query the JCR for stored properties matching XSS payload patterns using regex searches for script delimiters and JavaScript event attributes
Deploy a Content Security Policy (CSP) in report-only mode to surface inline script execution and unauthorized script sources within AEM-rendered pages
Correlate web server access logs with author activity to identify anomalous requests originating from rendered content pages

Monitoring Recommendations

Enable AEM access logging and forward events to a central SIEM for retention and analysis
Monitor authenticated author and administrator sessions for unexpected API calls or bulk content changes
Alert on browser console errors and CSP violation reports originating from AEM author instances

How to Mitigate CVE-2025-46989

Immediate Actions Required

Apply Adobe's security updates referenced in APSB25-48 to all AEM 6.5.x on-premise instances
Verify that AEM Cloud Service instances have received the vendor-deployed fix
Audit existing form field content for stored payloads and sanitize any suspicious entries
Review and restrict author-level account provisioning to reduce the pool of potential attackers

Patch Information

Adobe released fixes for CVE-2025-46989 in the updates documented in security bulletin APSB25-48. On-premise customers should upgrade AEM 6.5 to Service Pack 23 or later. AEM Cloud Service customers receive fixes automatically through Adobe's managed release process. Consult the Adobe Security Advisory APSB25-48 for exact version numbers and upgrade instructions.

Workarounds

Enforce a strict Content Security Policy that disallows inline scripts and restricts script sources to trusted origins
Apply Apache Sling and Dispatcher filter rules to block requests containing suspected XSS payloads before they reach AEM
Restrict form authoring and submission permissions to trusted users pending patch deployment

bash

# Example AEM Dispatcher filter rule to block common XSS patterns
/0100 { /type "deny" /url '*<script*' }
/0101 { /type "deny" /url '*javascript:*' }
/0102 { /type "deny" /url '*onerror=*' }