CVE-2025-64830: Adobe Experience Manager XSS Vulnerability

CVE-2025-64830 Overview

Adobe Experience Manager (AEM) contains a stored Cross-Site Scripting (XSS) vulnerability [CWE-79] affecting form field input handling. A low-privileged authenticated attacker can inject malicious JavaScript into vulnerable form fields. The payload executes in the browser of any victim who navigates to the page rendering the affected field. The vulnerability has a changed scope, meaning the injected script can affect resources beyond the vulnerable component. Adobe published details in security advisory APSB26-98.

Critical Impact
Stored XSS in AEM form fields allows authenticated attackers to execute arbitrary JavaScript in victims' browsers, enabling session theft, credential harvesting, and unauthorized actions performed on behalf of authenticated users.

Affected Products

Adobe Experience Manager (AEM) — refer to Adobe Security Advisory APSB26-98 for specific affected versions
AEM Cloud Service deployments hosting vulnerable form components
On-premise AEM installations exposing authoring or form rendering interfaces

Discovery Timeline

2026-09-08 - CVE-2025-64830 published to NVD
2026-09-09 - Last updated in NVD database

Technical Details for CVE-2025-64830

Vulnerability Analysis

The vulnerability is a stored Cross-Site Scripting flaw in Adobe Experience Manager form fields. AEM fails to properly sanitize or encode user-supplied input before storing it and later rendering it back to browsers. An attacker with low-level privileges can persist malicious <script> payloads or event-handler attributes into vulnerable form fields.

When a victim loads a page that renders the affected field, the browser interprets the injected content as executable code. The changed scope indicates the impact extends beyond the vulnerable component boundary. Injected scripts can access data or functionality accessible through the victim's browser context, including session cookies, form data, and administrative interfaces.

User interaction is required — a victim must browse to the page containing the poisoned field for exploitation to succeed. Because the payload is stored server-side, a single injection can affect every user who subsequently views the affected page.

Root Cause

The root cause is insufficient output encoding and input validation on data flowing into AEM form fields [CWE-79]. Server-side rendering emits attacker-controlled content into HTML contexts without contextual escaping, allowing HTML and JavaScript syntax to break out of expected data boundaries.

Attack Vector

The attack requires network access to the AEM instance and valid low-privileged credentials. The attacker submits crafted input containing JavaScript through form field editing workflows. The malicious content persists in AEM content storage. When any user — including higher-privileged administrators — views the rendered page, the payload executes in their session context. This can lead to privilege escalation through hijacked administrative sessions, exfiltration of content, or delivery of additional payloads.

See the Adobe Security Advisory APSB26-98 for technical remediation details.

Detection Methods for CVE-2025-64830

Indicators of Compromise

Form field content containing <script> tags, javascript: URIs, or event handlers such as onerror, onload, or onmouseover
Unexpected outbound HTTP requests from browsers rendering AEM pages, potentially indicating cookie or token exfiltration
AEM audit log entries showing form field modifications by low-privileged accounts followed by access from administrator accounts
Anomalous authentication or session activity for AEM administrators shortly after viewing content edited by lower-privileged users

Detection Strategies

Review AEM content repositories for stored HTML or JavaScript patterns in fields that should contain plain text
Enable and monitor Content Security Policy (CSP) violation reports for AEM-hosted pages to surface unexpected script execution
Correlate web access logs with content modification timestamps to identify potentially exploited pages

Monitoring Recommendations

Ingest AEM access, audit, and application logs into a centralized analytics platform for correlation across content edits and administrative session activity
Alert on form field submissions containing HTML control characters or JavaScript keywords from non-administrative accounts
Monitor browser telemetry from privileged users accessing AEM authoring interfaces for signs of script-based session abuse

How to Mitigate CVE-2025-64830

Immediate Actions Required

Apply the patches referenced in Adobe Security Advisory APSB26-98 to all affected AEM instances
Audit low-privileged AEM accounts for recent form field modifications and remove any embedded scripts or HTML from stored content
Rotate session tokens and administrator credentials if evidence of exploitation is found
Restrict authoring privileges to the minimum set of users required for content operations

Patch Information

Adobe has released fixes for CVE-2025-64830 as documented in security bulletin APSB26-98. Administrators should identify their AEM version and deployment model (Cloud Service or on-premise) and apply the corresponding update package published by Adobe. Consult the Adobe Security Advisory APSB26-98 for version-specific guidance.

Workarounds

Enforce a strict Content Security Policy that disallows inline scripts and restricts script sources to trusted origins
Deploy a web application firewall rule set that blocks HTML and JavaScript syntax in form field submissions where such content is not expected
Reduce the number of accounts holding form authoring privileges until patches are applied
Configure AEM dispatcher rules to filter suspicious characters and reject requests containing script payloads targeting form endpoints

bash

# Example CSP header to reduce stored XSS impact on AEM-hosted pages
Content-Security-Policy: default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'self'; report-uri /csp-report