CVE-2025-64626 is a stored Cross-Site Scripting (XSS) vulnerability identified in Adobe Experience Manager (AEM) versions 6.5.23 and earlier. Stored XSS vulnerabilities occur when malicious scripts are permanently stored on a target server, typically within form fields or other input mechanisms, and later executed in the browsers of users who access the affected content. In this case, a low-privileged attacker can inject arbitrary JavaScript code into vulnerable form fields within AEM. When other users browse pages containing these fields, the malicious scripts execute in their browsers, potentially leading to session hijacking, credential theft, or unauthorized actions performed on behalf of the victim. The vulnerability requires user interaction, as the victim must visit the compromised page to trigger the script execution. The CVSS 3.1 base score of 5.4 reflects a medium severity level, with an attack vector of network (remote exploitation), low attack complexity, requiring low privileges, and user interaction. The impact affects confidentiality and integrity but not availability, and the scope is changed, indicating that the vulnerability affects components beyond the initially vulnerable module. No public exploits have been reported yet, and no patches are currently linked, suggesting that organizations should be vigilant and prepare to apply updates once released. The vulnerability is classified under CWE-79, which is a common and well-understood web application security issue. Given AEM's widespread use in enterprise web content management, exploitation could lead to significant risks including data leakage and reputational damage.

For European organizations, this vulnerability poses a risk primarily to web applications and portals managed via Adobe Experience Manager. Exploitation could allow attackers to execute malicious scripts in the browsers of employees, customers, or partners, potentially leading to theft of session cookies, credentials, or sensitive data. This can facilitate further attacks such as account takeover or unauthorized actions within the affected web applications. The impact on confidentiality and integrity could disrupt business operations, damage trust, and lead to regulatory compliance issues under GDPR if personal data is compromised. Since availability is not affected, direct service disruption is unlikely. However, the reputational damage and potential legal consequences could be significant. Organizations with public-facing AEM deployments are at higher risk, especially those in sectors like finance, government, healthcare, and e-commerce, where sensitive data and user trust are critical. The medium severity rating suggests that while the risk is not critical, it should be addressed promptly to prevent exploitation.

1. Monitor Adobe’s official security advisories and apply patches or updates for Adobe Experience Manager as soon as they become available. 2. Implement strict input validation and output encoding on all user-supplied data within AEM forms to prevent injection of malicious scripts. 3. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. 4. Conduct regular security assessments and penetration testing focused on web application vulnerabilities, including XSS. 5. Use web application firewalls (WAFs) configured to detect and block common XSS attack patterns targeting AEM. 6. Educate developers and administrators on secure coding practices specific to AEM and web applications. 7. Monitor web server and application logs for unusual input patterns or repeated attempts to inject scripts. 8. Limit privileges of users who can submit content to the minimum necessary to reduce the risk of malicious input. 9. Consider implementing multi-factor authentication (MFA) for administrative access to reduce the impact of stolen credentials. 10. Prepare incident response plans to quickly address any detected exploitation attempts.