CVE-2025-64594 is a stored Cross-Site Scripting (XSS) vulnerability identified in Adobe Experience Manager (AEM), specifically affecting versions 6.5.23 and earlier. The vulnerability arises from insufficient sanitization of user-supplied input in certain form fields, allowing an attacker with low privileges to inject malicious JavaScript code that is persistently stored on the server. When other users access the affected pages containing these fields, the injected scripts execute in their browsers within the security context of the vulnerable site. This can lead to theft of session cookies, user impersonation, or redirection to malicious sites. The vulnerability requires user interaction (browsing to the infected page) and low privileges to exploit, but it does not require authentication to trigger the script execution. The CVSS 3.1 base score of 5.4 reflects a medium severity, with attack vector being network-based, low attack complexity, requiring privileges, and user interaction. The scope is changed, indicating that the vulnerability could affect resources beyond the initially vulnerable component. No patches or exploits are currently publicly available, but the vulnerability is officially published and reserved as of late 2025. Given AEM's widespread use in enterprise content management and web portals, this vulnerability poses a risk of client-side attacks that could compromise user data confidentiality and integrity.

For European organizations, the impact of CVE-2025-64594 can be significant, particularly for those relying on Adobe Experience Manager to deliver web content and manage digital assets. Exploitation could lead to session hijacking, unauthorized actions performed on behalf of users, and theft of sensitive information such as credentials or personal data. This can damage organizational reputation, lead to regulatory non-compliance (e.g., GDPR violations), and cause operational disruptions if attackers leverage the vulnerability to spread malware or conduct phishing campaigns. Public-facing portals and intranet sites are especially vulnerable, as they expose many users to the risk of malicious script execution. The medium severity score suggests that while the vulnerability is not critical, it still requires timely remediation to prevent exploitation. The absence of known exploits in the wild provides a window for proactive defense. However, the potential for lateral impact exists if attackers use stolen credentials or session tokens to escalate privileges or access internal systems.

1. Apply official Adobe patches or updates for Adobe Experience Manager as soon as they become available to address CVE-2025-64594. 2. Implement strict input validation and sanitization on all user-supplied data, especially in form fields that accept text input, to prevent injection of malicious scripts. 3. Use output encoding techniques (e.g., HTML entity encoding) when rendering user input in web pages to neutralize executable code. 4. Deploy Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and mitigate the impact of XSS attacks. 5. Conduct regular security audits and penetration testing focused on web application vulnerabilities, including XSS. 6. Monitor web server and application logs for unusual input patterns or script injection attempts. 7. Educate developers and administrators on secure coding practices and the risks associated with stored XSS. 8. Consider implementing web application firewalls (WAFs) with rules designed to detect and block XSS payloads targeting AEM. 9. Limit user privileges to the minimum necessary to reduce the risk posed by low-privileged attackers. 10. Review and harden authentication and session management mechanisms to reduce the impact of stolen session tokens.