CVE-2025-46861 Overview
Adobe Experience Manager (AEM) versions 6.5.22 and earlier contain a stored Cross-Site Scripting (XSS) vulnerability [CWE-79]. A low-privileged attacker can inject malicious JavaScript into vulnerable form fields. The injected script executes in a victim's browser when they visit the page containing the compromised field. The vulnerability affects both on-premise AEM installations and AEM Cloud Service deployments. Adobe addressed this issue in security bulletin APSB25-48.
Critical Impact
Stored XSS in AEM form fields allows authenticated attackers to execute arbitrary JavaScript in victim browsers, enabling session hijacking, credential theft, and unauthorized actions within the AEM authoring environment.
Affected Products
- Adobe Experience Manager 6.5.22 and earlier
- Adobe Experience Manager Cloud Service
- AEM Forms component (vulnerable form fields)
Discovery Timeline
- 2025-06-10 - CVE-2025-46861 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-46861
Vulnerability Analysis
The vulnerability is a stored Cross-Site Scripting (XSS) flaw classified under [CWE-79] (Improper Neutralization of Input During Web Page Generation). Adobe Experience Manager fails to properly sanitize user-supplied input written to specific form fields. The malicious payload persists in the AEM content repository and is served to any user who subsequently loads the affected page.
Exploitation requires low-privileged authenticated access to the AEM authoring environment and user interaction from a victim who browses to the affected content. The scope is marked as changed, meaning injected scripts execute in the browser context of users beyond the attacker's initial privilege boundary. This creates a viable path for privilege escalation when higher-privileged authors or administrators view the compromised content.
Root Cause
The root cause is insufficient output encoding and input validation on form field content stored in the AEM Java Content Repository (JCR). When rendered back to a page, the stored input is emitted into the HTML response without adequate contextual escaping, allowing browser-executed script tags and event handlers to survive intact.
Attack Vector
An authenticated attacker with content authoring permissions submits a crafted payload containing JavaScript into a vulnerable form field. AEM persists the payload without stripping or escaping executable script content. When a victim navigates to the page containing the field, their browser parses and executes the attacker's script under the origin of the AEM application. Consult the Adobe Security Advisory APSB25-48 for component-level technical details.
Detection Methods for CVE-2025-46861
Indicators of Compromise
- Form field content in the JCR repository containing <script> tags, javascript: URIs, or DOM event handlers such as onerror, onload, and onmouseover
- Unexpected outbound HTTP requests from author or publish instances to attacker-controlled domains
- AEM audit log entries showing form field modifications by low-privileged accounts followed by access from higher-privileged users
Detection Strategies
- Query the JCR for form component properties containing HTML control characters or script-like patterns using tools such as curl against the QueryBuilder servlet
- Review Dispatcher and web server logs for anomalous parameter values submitted to form-handling endpoints
- Deploy Content Security Policy (CSP) reporting to surface script executions from untrusted inline sources on AEM-served pages
Monitoring Recommendations
- Alert on repository writes to form field properties by accounts with author-only permissions
- Baseline normal form submission payloads and flag entries containing HTML tags, encoded angle brackets, or JavaScript keywords
- Monitor session activity for admin or high-privileged users viewing content recently modified by lower-privileged accounts
How to Mitigate CVE-2025-46861
Immediate Actions Required
- Apply the security update referenced in Adobe Security Advisory APSB25-48 to all AEM 6.5.x on-premise installations
- Confirm AEM Cloud Service instances are running a build that includes the fix, since Adobe manages cloud patching but tenants should verify version currency
- Audit form components created or modified prior to patching for injected script content and remediate affected nodes
Patch Information
Adobe published fixes in security bulletin APSB25-48. On-premise customers must upgrade beyond AEM 6.5.22 to the patched service pack or cumulative fix pack indicated by Adobe. AEM as a Cloud Service receives the fix through Adobe's managed release channel. Refer to the Adobe Security Advisory APSB25-48 for exact fixed build numbers.
Workarounds
- Restrict content authoring permissions to trusted users and enforce least privilege on form-editing capabilities
- Configure the AEM Dispatcher and reverse proxy to add a strict Content Security Policy header that blocks inline script execution
- Enable and tune AEM's built-in XSS protection APIs (XSSAPI) in custom form components until the patch is deployed
# Configuration example: restrictive CSP header at the Dispatcher/web server layer
Header always set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'self'"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
