CVE-2025-64594 is a stored Cross-Site Scripting (XSS) vulnerability identified in Adobe Experience Manager (AEM) versions 6.5.23 and earlier. Stored XSS occurs when malicious input is saved by the application and later rendered in users' browsers without proper sanitization or encoding. In this case, a low-privileged attacker can inject malicious JavaScript code into vulnerable form fields within AEM. When other users access pages containing these fields, the injected scripts execute in their browsers, potentially allowing attackers to steal session cookies, perform actions on behalf of users, or redirect victims to malicious sites. The vulnerability requires the attacker to have some privileges to submit data but does not require bypassing authentication mechanisms. User interaction is necessary as the victim must visit the compromised page. The CVSS 3.1 base score is 5.4 (medium), reflecting network attack vector, low attack complexity, low privileges required, user interaction needed, and partial impact on confidentiality and integrity but no impact on availability. No public exploits are known at this time, but the vulnerability's presence in a widely used enterprise content management system makes it a significant concern. The lack of a patch link suggests that remediation may require applying updates once available or implementing workarounds such as input validation and output encoding.

For European organizations, the impact of this vulnerability can be significant, especially for those relying on Adobe Experience Manager to deliver web content and digital experiences. Successful exploitation can lead to theft of sensitive user information, including session tokens and personal data, undermining user trust and potentially violating GDPR requirements. Attackers could also manipulate content or perform unauthorized actions within the context of affected users, leading to reputational damage and operational disruptions. Since AEM is often used by government agencies, financial institutions, and large enterprises in Europe, the risk extends to critical sectors. The vulnerability could be leveraged in targeted phishing campaigns or supply chain attacks, increasing the threat landscape. Although availability is not impacted, the confidentiality and integrity breaches pose compliance and security risks that require immediate attention.

European organizations should implement the following specific mitigations: 1) Monitor Adobe’s official channels for patches addressing CVE-2025-64594 and apply updates promptly once released. 2) Implement strict input validation and sanitization on all form fields within AEM to prevent malicious script injection. 3) Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. 4) Conduct regular security audits and penetration testing focused on web application vulnerabilities, including XSS. 5) Educate content authors and administrators on secure content handling practices to reduce injection risks. 6) Use web application firewalls (WAFs) with rules designed to detect and block XSS payloads targeting AEM. 7) Limit user privileges within AEM to the minimum necessary to reduce the attack surface. 8) Monitor logs and user activity for suspicious behavior indicative of exploitation attempts. These measures, combined with timely patching, will reduce the likelihood and impact of exploitation.