CVE-2025-64577 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 are permanently injected into web application data fields and later executed in the context of users' browsers. In this case, a low-privileged attacker can exploit vulnerable form fields within AEM to insert malicious JavaScript code. When other users access pages containing these compromised fields, the injected scripts execute, potentially leading to session hijacking, credential theft, or unauthorized actions performed on behalf of the victim. The vulnerability requires the attacker to have some privileges to submit data but does not require administrative access, increasing the attack surface. The CVSS 3.1 base score of 5.4 reflects a medium severity, with attack vector being network-based, low attack complexity, requiring privileges, and user interaction. The impact affects confidentiality and integrity but not availability. No patches or exploit code are currently publicly available, and no known active exploitation has been reported. However, given AEM's widespread use in enterprise content management and web portals, this vulnerability poses a significant risk if left unaddressed. The vulnerability is tracked under CWE-79, a common and well-understood class of web application security flaws. Organizations using AEM should prepare to apply vendor patches promptly and review their input validation and output encoding practices to mitigate this threat.

For European organizations, the impact of CVE-2025-64577 can be substantial, particularly for those relying on Adobe Experience Manager to deliver web content and manage digital assets. Exploitation could lead to unauthorized disclosure of sensitive information, such as session tokens or personal data, through malicious script execution in users' browsers. This can facilitate further attacks like account takeover or phishing. Integrity of data displayed on affected web pages may be compromised, undermining trust in the organization's digital services. Although availability is not directly impacted, reputational damage and regulatory consequences under GDPR could arise from data breaches or user exploitation. Public-facing portals, intranets, and customer-facing applications are especially vulnerable, as they expose a broad user base to potential malicious scripts. The requirement for user interaction means social engineering or phishing may be used to lure victims to compromised pages. The medium severity rating suggests that while the vulnerability is not critical, it still represents a meaningful risk that should be addressed promptly to prevent exploitation and protect user data and organizational reputation.

To mitigate CVE-2025-64577, European organizations should: 1) Monitor Adobe's security advisories closely and apply official patches or updates for Adobe Experience Manager as soon as they become available. 2) Implement strict input validation on all form fields to reject or sanitize potentially malicious input before storage. 3) Employ robust output encoding/escaping techniques when rendering user-supplied data in web pages to prevent script execution. 4) Restrict access to form submission features to only trusted and authenticated users where possible, minimizing the attack surface. 5) Conduct regular security assessments and penetration testing focused on XSS vulnerabilities within AEM deployments. 6) Educate users about the risks of clicking suspicious links or interacting with untrusted content to reduce successful exploitation via social engineering. 7) Utilize Content Security Policy (CSP) headers to limit the execution of unauthorized scripts in browsers. 8) Monitor web logs and user activity for unusual behavior indicative of exploitation attempts. These steps go beyond generic advice by focusing on both proactive patch management and layered defenses tailored to the specific nature of stored XSS in AEM environments.