CVE-2025-46863: Adobe Experience Manager XSS Vulnerability

CVE-2025-46863 Overview

CVE-2025-46863 is a stored Cross-Site Scripting (XSS) vulnerability affecting Adobe Experience Manager (AEM) versions 6.5.22 and earlier, including AEM Cloud Service. A low-privileged authenticated attacker can inject malicious JavaScript into vulnerable form fields. The payload persists in the application and executes in a victim's browser when they load the affected page. Exploitation requires user interaction, and the vulnerability has a scope change impact, meaning injected script can affect resources beyond the vulnerable component. The flaw is categorized under [CWE-79] Improper Neutralization of Input During Web Page Generation.

Critical Impact

Authenticated attackers can inject persistent JavaScript into AEM form fields, enabling session hijacking, credential theft, and unauthorized actions in the context of any user who views the affected page.

Affected Products

• Adobe Experience Manager 6.5.22 and earlier (on-premise)
• Adobe Experience Manager Cloud Service
• AEM form components rendering unsanitized user-supplied input

Discovery Timeline

• 2025-06-10 - CVE-2025-46863 published to NVD
• 2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-46863

Vulnerability Analysis

The vulnerability resides in AEM form components that fail to properly neutralize user-supplied input before rendering it back to the browser. An attacker with low privileges, typically a content author or form editor, can submit malicious markup or JavaScript into a form field. The payload is stored server-side and returned to any user who subsequently browses the page containing the field.

Because the flaw involves a scope change, JavaScript executed in the victim's browser runs in the origin of the AEM application. This enables theft of session cookies, manipulation of the Document Object Model (DOM), and forced actions on behalf of the victim. User interaction is required, meaning the victim must load or interact with the affected page for the payload to fire.

The vulnerability is exploitable over the network against authoring or publishing endpoints that render the tainted form data.

Root Cause

The root cause is insufficient output encoding of user-controlled data within AEM form field rendering logic. Adobe's advisory identifies the weakness as [CWE-79], indicating that user input is placed into HTML output without adequate context-aware sanitization. Standard HTML entity encoding or a strict Content Security Policy (CSP) is not consistently enforced on the affected fields.

Attack Vector

Exploitation proceeds in three stages. First, an authenticated attacker with content authoring privileges submits a JavaScript payload into a vulnerable form field, typically embedded within HTML event handlers or <script> tags. Second, AEM stores the payload without sanitization. Third, a victim browses the page containing the field, and the browser parses and executes the attacker-controlled script in the AEM origin. See the Adobe Security Advisory APSB25-48 for vendor-provided technical details.

Detection Methods for CVE-2025-46863

Indicators of Compromise

• Form field values or JCR node properties containing <script> tags, javascript: URIs, or DOM event handlers such as onerror, onload, or onclick.
• Unexpected outbound HTTP requests from author or publish instances referencing attacker-controlled domains.
• Anomalous session cookie transmission to non-AEM hosts observed in web proxy logs.

Detection Strategies

• Audit AEM content repositories (JCR) for stored form input containing HTML or JavaScript syntax using CRXDE Lite or curl queries against /bin/querybuilder.json.
• Deploy a Web Application Firewall (WAF) rule set that inspects form submissions for XSS payloads and blocks reflected script tags.
• Enable browser-side reporting via Content Security Policy (CSP) report-uri to surface script execution violations on pages rendering form data.

Monitoring Recommendations

• Correlate authentication logs for low-privileged authoring accounts with form-editing actions performed outside normal hours.
• Monitor AEM access logs for POST requests to form endpoints containing URL-encoded <script> or event handler patterns.
• Alert on any successful modification of published content by accounts that do not typically publish, indicating potential payload delivery.

How to Mitigate CVE-2025-46863

Immediate Actions Required

• Apply the security update referenced in Adobe advisory APSB25-48 to all on-premise AEM 6.5.x instances. AEM as a Cloud Service customers receive the fix through Adobe's managed update process.
• Review authoring account privileges and remove form-editing rights from users who do not require them.
• Scan existing form field content for previously injected payloads and remediate any tainted nodes before applying the patch.

Patch Information

Adobe released the fix as part of the June 2025 security bulletin. Refer to the Adobe Security Advisory APSB25-48 for the corrected package versions and installation instructions. Customers should upgrade to AEM 6.5.23 or later on-premise, and confirm the current release channel for AEM Cloud Service deployments.

Workarounds

• Enforce a strict Content Security Policy that disallows inline scripts and restricts script sources to trusted origins.
• Place a WAF in front of AEM author and publish tiers with signatures that block common XSS payload patterns in form submissions.
• Restrict access to authoring interfaces to trusted networks via IP allow-listing until the patch is applied.

# Example CSP header to mitigate stored XSS execution
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'self'"