CVE-2025-46881: Adobe Experience Manager XSS Vulnerability

CVE-2025-46881 Overview

CVE-2025-46881 is a stored Cross-Site Scripting (XSS) vulnerability affecting Adobe Experience Manager (AEM) versions 6.5.22 and earlier, along with AEM Cloud Service. The flaw allows a low-privileged attacker to inject malicious JavaScript into vulnerable form fields. When a victim browses to a page containing the injected content, the script executes in their browser under the AEM origin. Adobe published fixes in security bulletin APSB25-48. The vulnerability is tracked under CWE-79: Improper Neutralization of Input During Web Page Generation.

Critical Impact
Authenticated attackers with low privileges can persist JavaScript payloads inside AEM form fields, enabling session hijacking, credential theft, and content defacement targeting authors and site visitors.

Affected Products

Adobe Experience Manager 6.5.22 and earlier (on-premises)
Adobe Experience Manager Cloud Service
AEM Forms components handling stored field input

Discovery Timeline

2025-06-10 - CVE-2025-46881 published to NVD
2026-06-17 - Last updated in NVD database
Adobe Security Bulletin - APSB25-48

Technical Details for CVE-2025-46881

Vulnerability Analysis

Adobe Experience Manager fails to properly neutralize user-supplied input written into form fields before rendering it back to other users. An authenticated attacker with low privileges submits crafted input containing HTML or JavaScript. AEM stores the payload without sufficient sanitization or output encoding. When any user views the affected page, the browser parses the stored payload as executable script.

The scope is marked as changed, meaning code executed in the victim's browser can affect resources beyond the vulnerable component. This is characteristic of stored XSS in a content management platform where authors, administrators, and end users share the same trusted origin. Successful exploitation supports session token theft, forced actions in the AEM authoring interface, and phishing overlays served from a legitimate corporate domain.

Root Cause

The root cause is improper output encoding of form field data ([CWE-79]). AEM accepts input from a low-privileged user role, persists it, and later renders it into HTML context without context-aware escaping. Content-Security-Policy alone does not neutralize inline execution when the payload lives within the trusted DOM output path.

Attack Vector

Exploitation requires network access to the AEM instance, authenticated access at a low privilege level, and a victim who navigates to the page containing the malicious field. User interaction is required. No verified proof-of-concept code is publicly available, and the flaw is not listed in the CISA Known Exploited Vulnerabilities catalog.

The vulnerability mechanism is described in prose because no verified exploitation code is available. Refer to the Adobe Security Bulletin APSB25-48 for vendor-provided technical details.

Detection Methods for CVE-2025-46881

Indicators of Compromise

Form field values or JCR node properties containing <script>, onerror=, onload=, or javascript: substrings
Unexpected outbound requests from author or publish instances to attacker-controlled domains referenced in stored content
New or modified cq:Page and nt:unstructured nodes edited by low-privileged accounts outside normal authoring windows
Author session tokens observed in web server access logs from unusual geographies

Detection Strategies

Query the JCR repository for stored field values matching common XSS signatures such as HTML event handlers and script tags
Enable and review AEM audit logs (/var/audit) for content modifications by non-privileged authors
Deploy a Web Application Firewall rule set that inspects POST bodies to /content/* and /bin/* endpoints for script payloads
Correlate AEM Dispatcher logs with browser Content-Security-Policy violation reports to surface injection attempts

Monitoring Recommendations

Forward AEM error.log, request.log, and audit events to a centralized SIEM for retention and correlation
Alert on privilege changes and bulk content edits performed by newly created accounts
Track anomalous cookie access patterns and unexpected document.cookie references in browser telemetry
Baseline expected form submission content lengths and flag statistical outliers for review

How to Mitigate CVE-2025-46881

Immediate Actions Required

Apply the updates referenced in Adobe Security Bulletin APSB25-48 to AEM 6.5.22 and earlier
Audit low-privileged author accounts and remove or disable accounts that are inactive or unnecessary
Review recently modified content nodes for injected HTML or JavaScript and remediate affected pages
Rotate author session credentials and invalidate active sessions after patching

Patch Information

Adobe released remediation for CVE-2025-46881 in the June 2025 security update cycle. On-premises customers must install the AEM 6.5 Service Pack referenced in APSB25-48. AEM as a Cloud Service customers receive the fix automatically through the managed release channel. Verify the running version through the AEM Web Console before and after patching.

Workarounds

Restrict form authoring permissions to trusted users through AEM's user and group management until patches are applied
Deploy a WAF policy that filters HTML tags and JavaScript event handlers from submissions to AEM form endpoints
Enforce a strict Content-Security-Policy header that disallows unsafe-inline script execution on published pages
Enable AEM Dispatcher filters to block direct writes to sensitive JCR paths from anonymous or low-privileged sessions

bash

# Example AEM Dispatcher filter tightening (illustrative)
/filter {
  /0100 { /type "deny"  /url "*" }
  /0101 { /type "allow" /method "GET"  /url "/content/*" }
  /0102 { /type "allow" /method "POST" /url "/content/forms/*"
          /headers '(?i)Content-Type: application/x-www-form-urlencoded' }
  /0103 { /type "deny"  /url "*<*" }
  /0104 { /type "deny"  /url "*javascript:*" }
}