CVE-2025-64801 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 injected by an attacker into input fields are permanently stored on the server and later rendered in the browser of users who access the affected content. In this case, a low-privileged attacker can exploit vulnerable form fields to inject JavaScript code that executes in the context of other users' browsers when they visit the compromised page. This can lead to session hijacking, credential theft, or unauthorized actions performed with the victim's privileges. The vulnerability requires the attacker to have some privileges to inject the payload and for the victim to interact with the affected page, as indicated by the CVSS vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N). The vulnerability affects confidentiality and integrity but not availability. Although no known exploits are reported in the wild, the medium CVSS score of 5.4 highlights the need for timely remediation. Adobe has not yet released a patch, so organizations must rely on interim mitigations. 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 content management and digital experience platforms, this vulnerability poses a significant risk to organizations that rely on it for web content delivery and customer engagement.

For European organizations, the impact of this vulnerability can be significant, especially for those using Adobe Experience Manager to manage public-facing websites, intranets, or customer portals. Exploitation could lead to unauthorized disclosure of sensitive information such as session cookies or personal data, enabling attackers to impersonate users or escalate privileges. This can result in reputational damage, regulatory penalties under GDPR due to data breaches, and potential financial losses. The integrity of web content can also be compromised, allowing attackers to inject misleading or malicious content that could harm users or the organization's brand. Although availability is not directly affected, the indirect consequences of exploitation, such as loss of user trust and increased incident response costs, can be substantial. The requirement for user interaction and some privilege level reduces the likelihood of mass exploitation but does not eliminate targeted attacks against high-value European organizations. Industries such as finance, government, healthcare, and e-commerce, which often use AEM for digital services, are particularly at risk.

1. Monitor Adobe's official channels for patches addressing CVE-2025-64801 and apply them promptly once available. 2. Implement strict input validation on all form fields to reject or sanitize potentially malicious scripts before storage. 3. Employ robust output encoding/escaping techniques when rendering user-supplied content to prevent script execution. 4. Configure Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of XSS attacks. 5. Limit privileges of users who can submit content to the minimum necessary to reduce the attack surface. 6. Conduct regular security audits and penetration testing focused on web application input handling and stored XSS vulnerabilities. 7. Educate content managers and developers about secure coding practices related to XSS. 8. Use web application firewalls (WAFs) with rules designed to detect and block XSS payloads targeting AEM. 9. Monitor logs and user activity for unusual behavior that could indicate exploitation attempts. 10. Consider isolating critical AEM components or sensitive content behind additional authentication or network segmentation to reduce exposure.