CVE-2025-46859 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 the AEM platform, allowing a low-privileged attacker to inject malicious JavaScript code that is persistently stored on the server. When a victim user accesses a page containing the compromised form field, the malicious script executes in their browser context. This can lead to session hijacking, credential theft, unauthorized actions performed on behalf of the user, or the delivery of further malware. The vulnerability requires low privileges to exploit but does require user interaction, as the victim must visit the affected page to trigger the payload. The CVSS v3.1 base score is 5.4 (medium severity), reflecting network attack vector, low attack complexity, low privileges required, and user interaction needed. The vulnerability impacts confidentiality and integrity but does not affect availability. No known exploits are currently reported in the wild, and no patches have been linked yet. Given Adobe Experience Manager's widespread use in enterprise content management and digital experience delivery, this vulnerability poses a significant risk to organizations relying on AEM for web content hosting and customer engagement.

For European organizations, the impact of this vulnerability can be substantial. AEM is widely used by enterprises, government agencies, and public sector entities across Europe to manage digital content and customer-facing portals. Exploitation could lead to unauthorized access to sensitive user data, including personal information protected under GDPR, thereby risking regulatory penalties and reputational damage. Attackers could leverage the stored XSS to conduct phishing campaigns, steal session cookies, or perform actions on behalf of authenticated users, potentially leading to data breaches or unauthorized transactions. The persistence of the injected script increases the risk of widespread compromise among users accessing the affected pages. Additionally, public sector organizations and critical infrastructure entities using AEM may face targeted attacks aiming to disrupt services or gather intelligence. The medium severity score suggests moderate risk, but the potential for cascading effects in complex enterprise environments elevates the concern.

Organizations should prioritize the following mitigations: 1) Apply any available security patches or updates from Adobe immediately once released. 2) Implement strict input validation and output encoding on all user-supplied data in AEM forms to prevent script injection. 3) Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. 4) Conduct thorough code reviews and security testing of custom AEM components that handle user input. 5) Monitor web application logs for unusual input patterns or repeated attempts to inject scripts. 6) Educate users about the risks of clicking on suspicious links and encourage reporting of anomalous website behavior. 7) Consider deploying web application firewalls (WAFs) with rules tuned to detect and block XSS payloads targeting AEM. 8) Regularly audit and update third-party plugins or extensions integrated with AEM to ensure they do not introduce additional vulnerabilities.