CVE-2025-64554 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 scripts injected by an attacker are permanently stored on the target server, such as in form fields, and then 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 other users browse pages containing these fields, the injected scripts execute in their browsers, potentially allowing attackers to steal session cookies, perform actions on behalf of the user, or manipulate page content. The vulnerability requires the attacker to have some level of privilege to submit data and requires user interaction (visiting the affected page) for exploitation. The CVSS 3.1 base score is 5.4, indicating medium severity, with attack vector being network, low attack complexity, privileges required, user interaction required, and impacts on confidentiality and integrity but not availability. No public exploits or patches are currently available, but the vulnerability is publicly disclosed and should be addressed promptly. The vulnerability stems from insufficient input validation and output encoding in form fields, a common cause of stored XSS. Adobe Experience Manager is widely used by enterprises for content management and digital experience delivery, making this vulnerability significant for organizations relying on AEM for their web presence. Attackers exploiting this vulnerability could compromise user sessions, steal sensitive data, or deface websites, impacting trust and compliance.

For European organizations, the impact of CVE-2025-64554 can be significant, especially for those using Adobe Experience Manager to manage public-facing websites or intranet portals. Exploitation could lead to theft of user credentials or session tokens, unauthorized actions performed on behalf of users, and manipulation or defacement of web content. This can result in data breaches, loss of customer trust, regulatory non-compliance (e.g., GDPR), and reputational damage. Since AEM is often used by government, financial, and large enterprise sectors in Europe, the risk extends to critical services and sensitive information. The medium severity rating reflects that while the vulnerability does not directly impact availability, the confidentiality and integrity of user data and interactions are at risk. Attackers could leverage this vulnerability to conduct phishing, escalate privileges, or move laterally within networks after compromising user sessions. The lack of known exploits in the wild currently reduces immediate risk but does not eliminate the threat, especially as attackers often develop exploits after public disclosure.

European organizations should implement the following specific mitigations: 1) Monitor Adobe’s security advisories closely and apply official patches or updates for AEM as soon as they become available. 2) Conduct a thorough audit of all form fields and user input points in AEM to ensure proper input validation and output encoding are enforced to prevent script injection. 3) Implement Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers, limiting the impact of any injected code. 4) Restrict access to form submission functionalities to only trusted users or roles to reduce the attack surface. 5) Employ web application firewalls (WAFs) with rules tuned to detect and block XSS payloads targeting AEM. 6) Educate users and administrators about the risks of XSS and encourage vigilance when interacting with user-generated content. 7) Regularly scan web applications with automated tools to detect XSS vulnerabilities proactively. 8) Review and harden session management to prevent session hijacking if an XSS attack occurs. These measures, combined, reduce the likelihood and impact of exploitation beyond generic advice.