CVE-2025-64591 is a stored Cross-Site Scripting (XSS) vulnerability identified in Adobe Experience Manager (AEM), specifically affecting versions 6.5.23 and earlier. Stored XSS vulnerabilities occur when malicious scripts injected by an attacker are permanently stored on the target server, such as within form fields, and later executed in the browsers of users who access the affected content. In this case, a low-privileged attacker can submit malicious JavaScript code into vulnerable form fields within AEM. When legitimate users browse pages containing these fields, the injected scripts execute in their browsers, potentially leading to session hijacking, credential theft, or unauthorized actions performed on behalf of the user. The vulnerability requires user interaction (browsing the affected page) and low privileges to inject the payload, but does not require administrative access. The CVSS 3.1 base score is 5.4, indicating medium severity, with attack vector being network, low attack complexity, privileges required being low, user interaction required, and scope changed. The impact affects confidentiality and integrity to a limited extent, with no impact on availability. No public exploits have been reported yet, and Adobe has not provided patch links at the time of this report. The vulnerability is classified under CWE-79, which covers Cross-Site Scripting issues. Given AEM's widespread use in enterprise digital experience management, this vulnerability poses a risk to organizations relying on it for web content delivery and customer engagement.

For European organizations, the exploitation of this stored XSS vulnerability in Adobe Experience Manager could lead to unauthorized script execution in users' browsers, enabling attackers to steal session cookies, perform actions on behalf of users, or deliver further malware payloads. This can compromise user data confidentiality and integrity, damage organizational reputation, and potentially lead to regulatory non-compliance under GDPR if personal data is exposed. Since AEM is commonly used by government agencies, financial institutions, and large enterprises in Europe for managing digital content and customer interactions, the impact could be significant in sectors where trust and data protection are critical. The lack of availability impact means service disruption is unlikely, but the risk of targeted attacks exploiting this vulnerability to gain footholds or escalate privileges remains. The medium CVSS score reflects a moderate risk level, but the real-world impact depends on the extent of AEM deployment and the sensitivity of the data handled.

1. Monitor Adobe's official channels for patches addressing CVE-2025-64591 and apply updates promptly once available. 2. Implement strict input validation and sanitization on all form fields within AEM to prevent injection of malicious scripts. 3. Employ output encoding techniques to ensure that any user-supplied data rendered in web pages is safely escaped. 4. Configure Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of XSS attacks. 5. Conduct regular security audits and penetration testing focused on web application vulnerabilities, including XSS. 6. Educate content authors and administrators about the risks of injecting untrusted content and enforce least privilege principles. 7. Use web application firewalls (WAFs) with rules tuned to detect and block XSS payloads targeting AEM. 8. Monitor logs and user activity for unusual behavior that may indicate exploitation attempts. These measures, combined with patching, will reduce the risk and impact of this vulnerability beyond generic advice.