CVE-2025-46855 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 a page containing the compromised form field, the malicious 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 AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N, meaning the attack can be executed remotely over the network with low attack complexity, requires low privileges, and user interaction (visiting the malicious page) is necessary. The vulnerability impacts confidentiality and integrity by potentially allowing theft of session tokens, user credentials, or manipulation of displayed content, but does not affect availability. No known exploits are currently reported in the wild, and no patches have been linked yet. Given AEM's role as a content management system widely used by enterprises for managing web content, this vulnerability could be leveraged to conduct targeted attacks such as session hijacking, phishing, or delivering malware payloads through trusted websites.

For European organizations, the impact of this vulnerability can be significant, especially for those relying on Adobe Experience Manager to manage public-facing websites or intranet portals. Exploitation could lead to unauthorized disclosure of sensitive user information, including personal data protected under GDPR, resulting in regulatory penalties and reputational damage. Attackers could also manipulate website content to mislead users or distribute malicious payloads, undermining trust in the organization's digital presence. Since AEM is often used by government agencies, financial institutions, and large enterprises in Europe, successful exploitation could disrupt critical communications and services. The vulnerability's requirement for low privileges and remote exploitation increases the risk, particularly in environments where user input is not adequately monitored or sanitized. Although no active exploits are known, the medium severity rating and the persistent nature of stored XSS make this a credible threat vector that could be weaponized in targeted campaigns against European entities.

Organizations should immediately review and restrict user input on all AEM-managed forms, implementing strict input validation and output encoding to neutralize malicious scripts. Deploying Web Application Firewalls (WAFs) with custom rules to detect and block XSS payloads can provide an additional protective layer. Administrators should monitor logs for unusual input patterns or repeated form submissions indicative of exploitation attempts. Since no official patches are currently linked, organizations should engage with Adobe support for any available hotfixes or recommended configuration changes. Additionally, applying Content Security Policy (CSP) headers can help mitigate the impact of injected scripts by restricting script execution sources. User awareness training to recognize suspicious website behavior and cautious handling of links can reduce the risk of successful exploitation. Finally, organizations should prepare incident response plans specifically addressing XSS attacks to rapidly contain and remediate any incidents.