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 script code is permanently stored on a target server, such as within form fields, and later executed in the browsers of users who access the affected content. In this case, a low-privileged attacker can inject malicious JavaScript into vulnerable form fields within AEM. When legitimate users browse pages containing these fields, the injected script executes in their browsers, potentially allowing the attacker 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 privileges (PR:L) and user interaction (UI:R) but does not require physical access or elevated privileges. The CVSS 3.1 base score is 5.4, indicating a medium severity level, with the attack vector being network-based (AV:N), low attack complexity (AC:L), and a scope change (S:C) meaning the vulnerability affects resources beyond the initially vulnerable component. The impacts include limited confidentiality and integrity loss but no availability impact. No public exploits have been reported yet, and Adobe has not published patches at the time of this report. Organizations using AEM should monitor Adobe advisories for patches and consider interim mitigations such as input validation and output encoding. The vulnerability is categorized under CWE-79, which is a common and well-understood web application security issue.

For European organizations, the impact of this vulnerability can be significant, especially for those relying on Adobe Experience Manager for managing and delivering web content. Successful exploitation could lead to theft of user credentials, session hijacking, unauthorized actions performed on behalf of users, and potential defacement or manipulation of web content. This can damage organizational reputation, lead to data breaches involving personal or sensitive information, and disrupt business operations. Since AEM is widely used by enterprises, government agencies, and media companies in Europe, the risk of targeted attacks exploiting this vulnerability is notable. The requirement for low privileges and user interaction lowers the barrier for attackers, increasing the likelihood of exploitation in phishing or social engineering campaigns. The confidentiality and integrity impacts could also affect compliance with GDPR and other data protection regulations, potentially resulting in legal and financial consequences.

1. Apply patches promptly once Adobe releases an official fix for CVE-2025-64577. 2. Until patches are available, implement strict input validation and sanitization on all form fields to prevent malicious script injection. 3. Employ output encoding techniques to ensure that any user-supplied data rendered on web pages is properly escaped to prevent script execution. 4. Use Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of XSS attacks. 5. Conduct regular security audits and penetration testing focused on web application vulnerabilities, including XSS. 6. Educate users and administrators about the risks of phishing and social engineering that could facilitate exploitation. 7. Monitor web server logs and user activity for unusual behavior indicative of exploitation attempts. 8. Consider implementing Web Application Firewalls (WAFs) with rules designed to detect and block XSS payloads targeting AEM. 9. Limit privileges for users who can submit data to vulnerable forms to reduce the attack surface. 10. Review and harden AEM configurations to minimize exposure of vulnerable components.