CVE-2025-64620 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 vulnerable fields, the malicious scripts execute in their browsers, potentially leading to session hijacking, credential theft, or unauthorized actions performed in the context of the victim user. The vulnerability is characterized by a CVSS 3.1 base score of 5.4, indicating medium severity, with an attack vector of network (remote), low attack complexity, requiring low privileges, and user interaction to trigger. The scope is changed, meaning the vulnerability can affect components beyond the initially vulnerable module. Although no known exploits are currently reported in the wild, the widespread use of AEM in enterprise content management makes this a significant concern. The lack of available patches at the time of publication necessitates immediate mitigation efforts by affected organizations. The vulnerability falls under CWE-79, a common and well-understood class of web application security issues. The attack does not impact system availability but can compromise confidentiality and integrity by enabling script execution in victim browsers.

For European organizations, the impact of CVE-2025-64620 can be substantial, particularly for those relying on Adobe Experience Manager for managing public-facing websites, intranets, or customer portals. Successful exploitation could lead to the theft of sensitive user data, including authentication tokens and personal information, potentially violating GDPR requirements. It may also allow attackers to perform unauthorized actions on behalf of users, damaging organizational reputation and trust. While the vulnerability does not directly affect system availability, the indirect consequences such as data breaches or defacement could disrupt business operations and lead to regulatory penalties. The medium severity score reflects moderate risk, but the ease of exploitation combined with the broad deployment of AEM in Europe elevates the threat level. Organizations in sectors like finance, government, healthcare, and e-commerce, which often use AEM for digital content delivery, are particularly vulnerable. The requirement for user interaction means phishing or social engineering could be used to increase exploitation success.

1. Monitor Adobe’s official channels for patches addressing CVE-2025-64620 and apply them promptly once released. 2. Implement strict input validation on all form fields to sanitize and reject malicious scripts before storage. 3. Employ robust output encoding techniques to ensure that any user-supplied data rendered in web pages does not execute as code. 4. Deploy Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of potential XSS attacks. 5. Conduct regular security audits and penetration testing focused on web application vulnerabilities, including stored XSS. 6. Educate users and administrators about the risks of clicking on suspicious links or interacting with untrusted content to reduce the likelihood of triggering the vulnerability. 7. Use web application firewalls (WAFs) with updated rulesets capable of detecting and blocking XSS payloads targeting AEM. 8. Limit privileges of users who can submit data to vulnerable forms to reduce the attack surface. 9. Review and harden AEM configurations to minimize exposure of vulnerable components and unnecessary services.