CVE-2025-46919 is a stored Cross-Site Scripting (XSS) vulnerability affecting Adobe Experience Manager (AEM) versions 6.5.22 and earlier. This vulnerability arises from insufficient input sanitization in certain form fields within AEM, allowing a low-privileged attacker to inject malicious JavaScript code that is persistently stored on the server. When a victim user accesses the affected page containing the malicious payload, the injected script executes in their browser context. The vulnerability is classified under CWE-79, indicating improper neutralization of input during web page generation. The CVSS v3.1 base score is 5.4 (medium severity), with the vector indicating network attack vector (AV:N), low attack complexity (AC:L), requiring low privileges (PR:L), user interaction needed (UI:R), scope changed (S:C), and impacts on confidentiality and integrity (C:L/I:L) but no impact on availability (A:N). The scope change means the vulnerability affects resources beyond the initially vulnerable component, potentially impacting other components or users. Exploitation could lead to theft of session cookies, user impersonation, or unauthorized actions performed in the context of the victim user. Although no known exploits are currently reported in the wild, the vulnerability's presence in a widely used enterprise content management system makes it a significant concern. Adobe has not yet published a patch at the time of this report, increasing the urgency for organizations to apply mitigations or monitor for updates.

For European organizations, the impact of this vulnerability can be substantial, especially for those relying on Adobe Experience Manager to manage web content, intranet portals, or customer-facing applications. Successful exploitation could lead to unauthorized disclosure of sensitive information, including session tokens or personal data, violating GDPR requirements and potentially resulting in regulatory penalties. Attackers could leverage the vulnerability to perform phishing or social engineering attacks by injecting malicious scripts that alter page content or redirect users to fraudulent sites. The integrity of corporate communications and customer trust could be compromised. Additionally, the scope change in the vulnerability means that multiple components or user roles could be affected, increasing the risk of lateral movement or privilege escalation within the affected environment. Given that AEM is used by many large enterprises and public sector organizations across Europe, the potential for widespread impact exists if the vulnerability is exploited at scale.

1. Immediate mitigation should include restricting access to AEM administrative and content authoring interfaces to trusted personnel only, using network segmentation and strong authentication mechanisms. 2. Implement strict Content Security Policy (CSP) headers to limit the execution of unauthorized scripts in browsers accessing AEM-managed sites. 3. Conduct thorough input validation and output encoding on all user-supplied data within custom AEM components or templates to prevent injection of malicious scripts. 4. Monitor web server and application logs for unusual or suspicious input patterns that may indicate attempted exploitation. 5. Educate users and administrators about the risks of XSS and encourage vigilance regarding unexpected page behavior or prompts. 6. Stay alert for Adobe's official patch release and plan for rapid deployment once available. 7. Consider deploying Web Application Firewalls (WAFs) with rules tailored to detect and block XSS payloads targeting AEM. 8. Review and minimize the use of third-party plugins or custom code that may introduce additional XSS risks.