CVE-2025-64550 is a DOM-based Cross-Site Scripting (XSS) vulnerability identified in Adobe Experience Manager (AEM) versions 6.5.23 and earlier. DOM-based XSS occurs when client-side scripts write untrusted data to the Document Object Model (DOM) without proper sanitization, enabling attackers to inject malicious JavaScript code that executes in the victim's browser context. In this case, a low-privileged attacker can craft a malicious URL or manipulate a web page that, when visited or interacted with by a user, triggers the execution of arbitrary scripts. This can lead to theft of sensitive information such as session cookies, user credentials, or other data accessible in the browser, as well as potential manipulation of the web application’s behavior. The vulnerability requires user interaction, such as clicking a malicious link, and does not allow direct remote code execution on the server or denial of service. The CVSS v3.1 base score of 5.4 reflects a medium severity, with attack vector being network (remote), low attack complexity, low privileges required, and user interaction necessary. The scope is changed, indicating that the vulnerability affects components beyond the initially vulnerable module. No patches or exploit code are currently publicly available, and no known exploitation in the wild has been reported. Adobe Experience Manager is widely used by enterprises for web content management, making this vulnerability relevant for organizations relying on AEM for their digital presence. The vulnerability's exploitation could facilitate targeted phishing or social engineering attacks, potentially leading to further compromise if combined with other vulnerabilities or weak security controls.

For European organizations, the impact of CVE-2025-64550 primarily concerns confidentiality and integrity of user sessions and data accessed through Adobe Experience Manager portals. Successful exploitation could allow attackers to hijack user sessions, steal sensitive information, or perform unauthorized actions within the context of the victim’s browser. This is particularly critical for organizations handling personal data under GDPR, as data leakage could lead to regulatory penalties and reputational damage. Although availability is not directly affected, the indirect consequences of compromised user accounts or administrative sessions could disrupt business operations or lead to further intrusions. Sectors such as government, finance, healthcare, and large enterprises that use AEM for public-facing websites or intranet portals are at higher risk. The requirement for user interaction limits mass exploitation but does not eliminate targeted spear-phishing or social engineering risks. The medium severity score suggests a moderate threat level, but the widespread use of AEM in Europe and the sensitivity of data managed through these platforms elevate the importance of timely mitigation.

1. Monitor Adobe’s official channels for patches addressing CVE-2025-64550 and apply updates promptly once available. 2. Implement strict input validation and output encoding on all user-controllable inputs within AEM to prevent injection of malicious scripts into the DOM. 3. Deploy a robust Content Security Policy (CSP) to restrict execution of unauthorized scripts and reduce the impact of XSS attacks. 4. Educate users and administrators about the risks of clicking on suspicious links or interacting with untrusted content, emphasizing phishing awareness. 5. Review and harden web application configurations, disabling unnecessary features or scripts that could be exploited. 6. Use web application firewalls (WAFs) with rules tuned to detect and block typical XSS attack patterns targeting AEM. 7. Conduct regular security assessments and penetration testing focused on client-side vulnerabilities in AEM deployments. 8. Limit privileges of users and administrators within AEM to minimize potential damage from compromised accounts. 9. Monitor logs and network traffic for unusual activity that could indicate exploitation attempts. 10. Consider isolating critical AEM instances or sensitive content behind additional authentication or network segmentation.