CVE-2025-64804 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 input in certain form fields, allowing a low-privileged attacker to inject malicious JavaScript code that is stored on the server. When other users access the affected pages containing these fields, the malicious script executes in their browsers within the context of the vulnerable site. This can lead to theft of session cookies, user impersonation, or manipulation of the displayed content, compromising confidentiality and integrity. The vulnerability requires the attacker to have some level of privileges to submit the malicious input 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 scope is changed (S:C), meaning the vulnerability can affect resources beyond the vulnerable component. Although no known exploits are currently reported in the wild and no official patches have been released, the medium CVSS score of 5.4 reflects the moderate risk posed by this vulnerability. Adobe Experience Manager is widely used by enterprises for managing digital content and customer experiences, making this vulnerability a significant concern for organizations relying on this platform. Attackers exploiting this flaw could perform targeted attacks to steal sensitive information or disrupt user trust. The vulnerability is classified under CWE-79, which covers improper neutralization of input during web page generation. Due to the nature of stored XSS, the impact can be persistent and affect multiple users over time if not remediated promptly.

For European organizations using Adobe Experience Manager, this vulnerability poses a risk of client-side attacks that can compromise user sessions and data confidentiality. Exploitation could lead to unauthorized access to sensitive information, session hijacking, or manipulation of web content, potentially damaging brand reputation and user trust. Since AEM is often used by large enterprises, government agencies, and public sector organizations in Europe to deliver digital services, the impact could extend to critical infrastructure and services. The requirement for low privileges and user interaction lowers the barrier for exploitation, increasing risk in environments with many users. Persistent XSS can facilitate phishing campaigns or malware distribution, amplifying the threat. Organizations in sectors such as finance, healthcare, and public administration, which rely heavily on secure web platforms, may face regulatory and compliance consequences if this vulnerability is exploited. The absence of known exploits currently provides a window for proactive mitigation, but the widespread use of AEM in Europe necessitates urgent attention.

1. Implement strict input validation and sanitization on all form fields within Adobe Experience Manager to prevent injection of malicious scripts. 2. Apply context-aware output encoding to ensure that any user-supplied data rendered in web pages is safely escaped. 3. Restrict user privileges to the minimum necessary, limiting the ability of low-privileged users to submit potentially harmful content. 4. Monitor web application logs and user activity for unusual input patterns or repeated failed attempts to inject scripts. 5. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. 6. Regularly update Adobe Experience Manager to the latest versions once Adobe releases patches addressing this vulnerability. 7. Conduct security awareness training for administrators and content managers to recognize and respond to potential XSS attacks. 8. Use web application firewalls (WAFs) with rules tailored to detect and block XSS payloads targeting AEM. 9. Perform regular security testing, including automated scanning and manual penetration testing focused on XSS vectors. 10. Isolate critical AEM instances and restrict access to trusted networks to reduce exposure.