CVE-2025-64551 is a DOM-based Cross-Site Scripting (XSS) vulnerability identified in Adobe Experience Manager (AEM) versions 6.5.23 and earlier. This vulnerability arises from improper handling of user-controllable input within the Document Object Model (DOM), allowing an attacker to inject and execute malicious scripts in the context of a victim's browser. The attack vector requires a low-privileged attacker to craft a malicious URL or manipulate a web page that, when visited or interacted with by an unsuspecting user, triggers the execution of arbitrary JavaScript code. The vulnerability affects confidentiality and integrity by potentially exposing sensitive information such as session tokens, cookies, or other private data accessible within the browser context, and may allow attackers to perform actions on behalf of the victim. However, it does not impact system availability. The CVSS v3.1 base score is 5.4, reflecting medium severity, with the vector indicating network attack vector (AV:N), low attack complexity (AC:L), low privileges required (PR:L), user interaction required (UI:R), scope changed (S:C), and partial impact on confidentiality and integrity (C:L/I:L) but no impact on availability (A:N). No patches or exploits are currently publicly available, but the vulnerability is published and should be addressed promptly. Given Adobe Experience Manager's widespread use in enterprise content management and digital experience platforms, exploitation could lead to significant data exposure or session compromise if left unmitigated.

For European organizations, the impact of CVE-2025-64551 can be significant, especially for those relying on Adobe Experience Manager to deliver web content and digital services. Successful exploitation could lead to unauthorized disclosure of sensitive information such as authentication tokens, user credentials, or personal data, violating GDPR and other data protection regulations. This could result in reputational damage, regulatory fines, and loss of customer trust. Additionally, attackers could leverage the vulnerability to perform session hijacking or conduct further attacks within the compromised user session. Although availability is not affected, the integrity and confidentiality breaches pose risks to business operations and compliance. Organizations in sectors such as finance, government, healthcare, and e-commerce, which often use AEM for customer-facing portals, are particularly vulnerable. The requirement for user interaction means phishing or social engineering campaigns could be used to facilitate exploitation, increasing the threat surface. The absence of known exploits in the wild currently reduces immediate risk but does not eliminate the need for proactive mitigation.

To mitigate CVE-2025-64551, European organizations should: 1) Apply official Adobe patches or updates as soon as they become available, prioritizing upgrading beyond version 6.5.23. 2) Implement strict input validation and sanitization on all user-controllable inputs processed by AEM to prevent malicious script injection. 3) Deploy Content Security Policy (CSP) headers to restrict the execution of untrusted scripts and reduce the impact of potential XSS attacks. 4) Educate users and administrators about the risks of interacting with suspicious URLs or web content to reduce successful exploitation via social engineering. 5) Monitor web application logs and user activity for anomalies indicative of XSS exploitation attempts. 6) Use web application firewalls (WAFs) configured to detect and block common XSS attack patterns targeting AEM. 7) Conduct regular security assessments and penetration testing focused on client-side vulnerabilities within AEM deployments. 8) Limit the privileges of users and services interacting with AEM to minimize potential damage from compromised sessions. These measures, combined, will reduce the likelihood and impact of exploitation until patches are fully deployed.