CVE-2025-64586 is a stored Cross-Site Scripting (XSS) vulnerability classified under CWE-79, impacting Adobe Experience Manager (AEM) versions 6.5.23 and earlier. The vulnerability arises from insufficient input validation or output encoding in certain form fields, allowing an attacker with low privileges to inject malicious JavaScript code that is stored on the server. When legitimate users access the affected pages, the malicious script executes in their browsers, potentially leading to session hijacking, credential theft, or unauthorized actions performed with the victim's privileges. The vulnerability requires the attacker to have some level of access to submit malicious input, and user interaction is necessary for exploitation, as the victim must visit the compromised page. The CVSS v3.1 score of 5.4 reflects a medium severity level, with network attack vector, low attack complexity, low privileges required, and user interaction needed. The scope is changed, indicating that the vulnerability affects components beyond the initially vulnerable part, potentially impacting other system components or users. No patches or exploit code are currently publicly available, but the vulnerability is officially published and should be addressed promptly. Given AEM's widespread use in enterprise content management and digital experience delivery, this vulnerability poses a risk to confidentiality and integrity of user data and sessions.

For European organizations, exploitation of this vulnerability could lead to unauthorized execution of malicious scripts in users' browsers, resulting in session hijacking, theft of sensitive information, or manipulation of web content. This could damage organizational reputation, lead to data breaches, and cause compliance violations under GDPR due to unauthorized access to personal data. Since AEM is commonly used by large enterprises, government agencies, and digital service providers across Europe, successful exploitation could disrupt critical web services and erode user trust. The medium severity indicates that while availability is not impacted, confidentiality and integrity risks are significant, especially in environments with high-value or sensitive web content. Organizations relying heavily on AEM for customer-facing portals or internal applications are at increased risk of targeted attacks leveraging this vulnerability.

Organizations should immediately assess their Adobe Experience Manager deployments to identify affected versions (6.5.23 and earlier). Although no patches are currently listed, monitoring Adobe's official security advisories for updates or patches is critical. In the interim, implement strict input validation and output encoding on all form fields to prevent script injection. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. Limit user privileges to the minimum necessary to reduce the risk of malicious input submission. Conduct regular security audits and penetration testing focused on web application vulnerabilities. Educate users about the risks of clicking suspicious links or interacting with untrusted content. Additionally, consider deploying Web Application Firewalls (WAFs) with rules tailored to detect and block XSS payloads targeting AEM. Finally, maintain robust incident response plans to quickly address any exploitation attempts.