CVE-2025-64616 is a stored Cross-Site Scripting (XSS) vulnerability identified in Adobe Experience Manager (AEM) versions 6.5.23 and earlier. The vulnerability arises from insufficient sanitization of user input in certain form fields, allowing a low-privileged attacker to inject malicious JavaScript code that is stored persistently on the server. When other users access the affected pages containing these fields, the malicious script executes in their browsers under the context of the vulnerable application. This can lead to theft of session tokens, unauthorized actions performed on behalf of users, or redirection to malicious sites, compromising confidentiality and integrity of user data. The vulnerability requires user interaction (browsing to the infected page) and low privileges to exploit, but the scope is significant because the injected script runs with the privileges of the victim user. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N) reflects network attack vector, low attack complexity, low privileges required, user interaction needed, scope change, and partial impact on confidentiality and integrity. No patches were linked at the time of publication, and no known exploits have been reported in the wild, indicating it may be newly disclosed or not yet weaponized. Given AEM's widespread use in enterprise content management, this vulnerability poses a risk to organizations that have not updated to fixed versions or implemented compensating controls.

For European organizations, the impact of CVE-2025-64616 can be significant, especially for those relying on Adobe Experience Manager for managing web content, intranet portals, or customer-facing applications. Exploitation could lead to unauthorized disclosure of sensitive information such as session cookies or personal data, enabling further attacks like session hijacking or privilege escalation. The integrity of web content and user interactions can be compromised, potentially damaging organizational reputation and trust. While availability is not directly impacted, the indirect effects of compromised user accounts or data leakage can disrupt business operations. Organizations in sectors with strict data protection regulations (e.g., GDPR) face additional compliance risks and potential fines if personal data is exposed. The medium CVSS score reflects a moderate risk level but should not be underestimated given the potential for chained attacks and the broad user base of AEM in Europe.

1. Apply official patches or updates from Adobe as soon as they become available to address this vulnerability directly. 2. Implement strict input validation on all form fields to reject or sanitize potentially malicious scripts before storage. 3. Use context-aware output encoding (e.g., HTML entity encoding) when rendering user-supplied data to prevent script execution. 4. Restrict user privileges to the minimum necessary, limiting the ability of low-privileged users to inject harmful content. 5. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. 6. Conduct regular security audits and penetration testing focused on web application vulnerabilities, including XSS. 7. Educate developers and administrators on secure coding practices and the risks of stored XSS. 8. Monitor web traffic and logs for unusual activity that could indicate exploitation attempts. 9. Consider deploying Web Application Firewalls (WAFs) with rules tailored to detect and block XSS payloads targeting AEM. 10. Isolate critical AEM instances and sensitive user groups to reduce the blast radius of potential attacks.