CVE-2025-64576 is a stored Cross-Site Scripting (XSS) vulnerability identified in Adobe Experience Manager (AEM) versions 6.5.23 and earlier. This vulnerability allows an attacker with low privileges to inject malicious JavaScript code into form fields that are not properly sanitized or encoded. When other users visit the affected pages containing these fields, the malicious scripts execute in their browsers, potentially leading to session hijacking, unauthorized actions, or data theft. The vulnerability is classified under CWE-79, indicating improper neutralization of input during web page generation. The CVSS v3.1 base score of 5.4 reflects that the attack vector is network-based (remote), with low attack complexity, requiring low privileges and user interaction, and impacts confidentiality and integrity but not availability. The scope is changed (S:C), meaning the vulnerability can affect resources beyond the initially vulnerable component. No patches or exploits are currently publicly available, but the vulnerability is published and should be addressed proactively. Adobe Experience Manager is widely used for enterprise content management, making this vulnerability relevant for organizations relying on AEM for their web presence and digital services. The stored nature of the XSS means the malicious payload persists on the server, increasing the risk of repeated exploitation. Attackers could leverage this to perform phishing, session theft, or defacement attacks against users and administrators accessing the affected pages.

For European organizations, this vulnerability poses a significant risk to the confidentiality and integrity of user sessions and data accessed via Adobe Experience Manager-powered websites. Exploitation could lead to theft of authentication tokens, enabling attackers to impersonate users or administrators, potentially escalating privileges or accessing sensitive information. The stored XSS nature means that once the malicious script is injected, it can affect all users visiting the compromised page, amplifying the impact. This is particularly critical for public sector websites, financial institutions, and enterprises handling personal data under GDPR regulations, where data breaches can lead to regulatory penalties and reputational damage. Although availability is not impacted, the trustworthiness of web services can be undermined, affecting customer confidence and business continuity. The requirement for user interaction and low privileges lowers the barrier for exploitation, increasing the likelihood of successful attacks if mitigations are not applied promptly.

1. Apply official Adobe patches or updates for Adobe Experience Manager as soon as they become available to address CVE-2025-64576. 2. Implement strict server-side input validation and sanitization on all form fields to prevent injection of malicious scripts. 3. Use context-aware output encoding (e.g., HTML entity encoding) when rendering user-supplied data in web pages. 4. Deploy Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of XSS attacks. 5. Conduct regular security audits and penetration testing focused on web application inputs and stored content. 6. Educate content authors and administrators on secure content handling practices to avoid inadvertent injection of malicious code. 7. Monitor web server logs and user activity for unusual patterns that may indicate exploitation attempts. 8. Consider implementing web application firewalls (WAF) with rules tuned to detect and block XSS payloads targeting AEM. 9. Limit privileges of users who can submit content to reduce the risk posed by low-privileged attackers. 10. Maintain an incident response plan that includes procedures for XSS attack detection and mitigation.