CVE-2025-64852 is a stored Cross-Site Scripting (XSS) vulnerability identified in Adobe Experience Manager (AEM), specifically affecting versions 6.5.23 and earlier. Stored XSS vulnerabilities occur when malicious scripts are permanently stored on target servers, such as within form fields, and later executed in the browsers of users who access the affected pages. In this case, a low-privileged attacker can exploit vulnerable form fields to inject arbitrary JavaScript code. When a victim visits the compromised page, the malicious script executes in their browser context, potentially allowing the attacker to steal session cookies, perform actions on behalf of the user, or manipulate page content. The vulnerability requires user interaction (visiting the affected page) and low privileges to exploit, which lowers the barrier for attackers but limits the scope compared to remote code execution flaws. The CVSS 3.1 base score is 5.4, indicating medium severity, with the vector AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N. This means the attack is network exploitable with low complexity, requires low privileges and user interaction, affects confidentiality and integrity partially, but does not impact availability. No public exploits or active exploitation in the wild have been reported to date. Adobe has not yet released a patch, but organizations are advised to monitor for updates. The vulnerability is classified under CWE-79, a common and well-understood web application security issue. Given AEM's widespread use in enterprise content management and digital experience platforms, exploitation could lead to data leakage, session hijacking, or unauthorized actions within affected web applications.

For European organizations, the impact of CVE-2025-64852 can be significant, especially for those relying on Adobe Experience Manager for critical web content and customer engagement platforms. Exploitation could lead to the compromise of user session data, unauthorized actions performed on behalf of legitimate users, and potential leakage of sensitive information. This can damage organizational reputation, lead to regulatory non-compliance (e.g., GDPR violations due to data exposure), and cause operational disruptions. Since the vulnerability affects confidentiality and integrity but not availability, the primary risks involve data theft and unauthorized manipulation rather than service outages. The requirement for user interaction means phishing or social engineering could be used to lure victims to vulnerable pages. European organizations with public-facing AEM instances are particularly at risk, as attackers can target a broad user base. The lack of known exploits in the wild currently reduces immediate risk, but the medium severity score and the common nature of XSS vulnerabilities warrant proactive mitigation.

1. Monitor Adobe security advisories closely and apply official patches or updates for Adobe Experience Manager as soon as they become available. 2. Implement strict server-side input validation and sanitization on all form fields to prevent injection of malicious scripts. 3. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of potential XSS payloads. 4. Conduct regular security testing, including automated scanning and manual penetration testing focused on XSS vulnerabilities in AEM deployments. 5. Educate users and administrators about the risks of clicking on suspicious links or interacting with untrusted content to reduce the chance of successful exploitation. 6. Use web application firewalls (WAFs) with rules tuned to detect and block XSS attack patterns targeting AEM. 7. Review and harden AEM configurations to minimize exposure of vulnerable components and disable unnecessary features that may increase attack surface. 8. Implement multi-factor authentication (MFA) for administrative access to reduce the impact of session hijacking.