CVE-2025-64868: Adobe Experience Manager XSS Vulnerability

CVE-2025-64868 Overview

CVE-2025-64868 is a stored Cross-Site Scripting (XSS) vulnerability affecting Adobe Experience Manager (AEM). A low-privileged authenticated attacker can inject malicious JavaScript into vulnerable form fields. The payload executes in the browser of any victim who loads a page rendering the affected field. Exploitation requires user interaction, and the vulnerability has a changed scope, meaning injected script can affect resources beyond the vulnerable component. The flaw is classified under [CWE-79] Improper Neutralization of Input During Web Page Generation.

Critical Impact
Authenticated attackers with low privileges can persist malicious JavaScript in AEM content, hijacking sessions or performing actions in the context of authenticated viewers across trust boundaries.

Affected Products

Adobe Experience Manager (AEM) — refer to Adobe Security Advisory APSB26-98 for the affected version list
AEM Cloud Service deployments (per vendor advisory)
AEM on-premises and Managed Services instances (per vendor advisory)

Discovery Timeline

2026-09-08 - CVE-2025-64868 published to the National Vulnerability Database (NVD)
2026-09-08 - Last updated in NVD database

Technical Details for CVE-2025-64868

Vulnerability Analysis

The vulnerability is a stored XSS flaw in Adobe Experience Manager form field handling. AEM fails to properly neutralize attacker-controlled input before persisting it and rendering it back to users. When a victim navigates to a page containing the poisoned field, the browser interprets the injected payload as executable JavaScript in the site's origin.

Because the CVSS scope is changed, code executing in the vulnerable component can affect resources managed by a different security authority. In practical terms, a script injected through an authoring or form-submission surface can execute against authenticated content consumers, including administrators viewing the affected page.

Exploitation requires an attacker account with low privileges and user interaction from the victim. Confidentiality and integrity impacts are limited to what the victim's browser session exposes, such as authentication cookies, CSRF tokens, or in-page data.

Root Cause

The root cause is insufficient output encoding or input sanitization on form field values persisted by AEM. Content submitted through the vulnerable interface is stored and later rendered without contextual escaping, allowing HTML and script tags to break out of their intended data context.

Attack Vector

The attack vector is network-based. An authenticated attacker submits a payload containing JavaScript through the vulnerable form field. AEM stores the payload in its content repository. When another user, potentially a higher-privileged administrator, browses to the page rendering the field, the browser executes the injected script in the AEM origin.

No verified proof-of-concept code is publicly available. See the Adobe Security Advisory APSB26-98 for vendor-supplied technical details.

Detection Methods for CVE-2025-64868

Indicators of Compromise

Form field values in the AEM content repository containing <script>, javascript:, onerror=, onload=, or encoded variants such as <script>
Unexpected outbound requests from authenticated user browsers to attacker-controlled domains shortly after loading AEM-rendered pages
Author or content-contributor accounts submitting payloads with unusual HTML entities or long base64-encoded strings in field inputs

Detection Strategies

Review AEM access and audit logs for POST requests from low-privileged accounts writing to form-field endpoints with suspicious payload patterns
Deploy a web application firewall (WAF) rule set that flags XSS signatures on AEM authoring and form-submission URIs
Scan the JCR content repository for stored properties containing HTML event handlers or script tags

Monitoring Recommendations

Forward AEM dispatcher, publish, and author logs to a centralized SIEM for correlation with authentication and content-modification events
Alert on Content Security Policy (CSP) violation reports originating from AEM-hosted pages
Track privilege changes and content edits made by newly created or infrequently used accounts

How to Mitigate CVE-2025-64868

Immediate Actions Required

Apply the Adobe security update referenced in APSB26-98 to all AEM instances (author, publish, and dispatcher tiers)
Audit existing form field content for previously injected payloads and remove or sanitize suspicious entries
Review and reduce the population of accounts with content-contributor or form-authoring privileges

Patch Information

Adobe has published a security bulletin addressing this vulnerability. Consult Adobe Security Advisory APSB26-98 for the fixed version numbers, applicable service packs, and installation guidance for both AEM Cloud Service and on-premises deployments.

Workarounds

Enforce a strict Content Security Policy that disallows inline scripts and restricts script sources to trusted origins
Configure the AEM dispatcher and any upstream WAF to filter HTML and script tokens on form submission endpoints until patching is complete
Temporarily restrict form-authoring capabilities to a minimal set of trusted users while remediation is planned

bash

# Example restrictive Content Security Policy header for AEM-served pages
Content-Security-Policy: default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'self'; report-uri /csp-report