CVE-2025-64814 is a stored Cross-Site Scripting (XSS) vulnerability identified in Adobe Experience Manager (AEM) versions 6.5.23 and earlier. The vulnerability arises from insufficient sanitization of user-supplied input in certain form fields, allowing an attacker with low privileges to inject malicious JavaScript code that is persistently stored on the server. When other users access the affected pages containing these fields, the injected script executes in their browsers within the security context of the vulnerable site. This can lead to theft of session cookies, user credentials, or other sensitive information, as well as unauthorized actions performed on behalf of the victim. The vulnerability requires the attacker to have at least low-level privileges to submit malicious input and requires user interaction (visiting the affected page) for exploitation. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N) indicates network attack vector, low attack complexity, low privileges required, user interaction needed, scope changed, and low impact on confidentiality and integrity, with no impact on availability. No public exploits have been reported yet, and no patches are currently linked, suggesting that organizations should monitor for updates from Adobe. The vulnerability is categorized under CWE-79, a common and well-understood class of web application security issues. Given AEM's widespread use in enterprise content management and digital experience platforms, this vulnerability poses a risk to organizations relying on AEM for public-facing websites or internal portals.

For European organizations, the impact of CVE-2025-64814 can be significant, particularly for those using Adobe Experience Manager to manage customer-facing websites or internal collaboration portals. Exploitation could lead to unauthorized disclosure of sensitive information such as session tokens or personal data, enabling further attacks like account takeover or data exfiltration. The integrity of web content could be compromised, leading to defacement or distribution of malicious payloads to users, damaging organizational reputation and trust. Although availability is not directly impacted, the indirect effects of exploitation—such as regulatory penalties under GDPR for data breaches—could be severe. The requirement for low privileges to inject scripts means insider threats or compromised low-level accounts could be leveraged. The need for user interaction limits automated exploitation but does not eliminate risk, especially in environments with high user traffic. The absence of known exploits in the wild provides a window for proactive mitigation, but the medium CVSS score indicates a non-trivial risk that should be addressed promptly.

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 sanitization on all form fields to prevent injection of malicious scripts. Use server-side validation in addition to client-side checks. 3. Employ robust output encoding/escaping techniques to ensure that user-supplied data is safely rendered in HTML contexts. 4. Deploy Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of potential XSS attacks. 5. Conduct regular security assessments and penetration testing focused on web application vulnerabilities, including XSS. 6. Limit user privileges to the minimum necessary to reduce the risk of low-privileged attackers injecting malicious content. 7. Educate users and administrators about the risks of clicking untrusted links or submitting unverified content. 8. Use web application firewalls (WAFs) with rules designed to detect and block XSS attack patterns targeting AEM. 9. Review and harden AEM configurations, disabling or restricting features that allow arbitrary content submission where possible. 10. Maintain comprehensive logging and monitoring to detect suspicious activities related to form submissions and script execution.