CVE-2025-46951 is a stored Cross-Site Scripting (XSS) vulnerability affecting Adobe Experience Manager (AEM) versions 6.5.22 and earlier. This vulnerability allows a low-privileged attacker to inject malicious JavaScript code into vulnerable form fields within the AEM platform. When a victim subsequently visits a page containing the compromised form field, the malicious script executes in their browser context. Stored XSS vulnerabilities are particularly dangerous because the injected payload is saved on the server and served to multiple users, increasing the attack surface and potential impact. The vulnerability requires low privileges to exploit but does require user interaction, as the victim must visit the affected page. The CVSS v3.1 base score is 5.4 (medium severity), reflecting the network attack vector, low attack complexity, low privileges required, requirement for user interaction, and partial impact on confidentiality and integrity but no impact on availability. The vulnerability is scoped, meaning the impact crosses security boundaries within the application. No known exploits are currently reported in the wild, and no patches or mitigation links have been provided at this time. Stored XSS in AEM can lead to session hijacking, credential theft, defacement, or further exploitation of the victim's browser and network, especially in environments where AEM is used to manage critical web content and internal portals.

For European organizations, the impact of this vulnerability can be significant due to the widespread use of Adobe Experience Manager in enterprise content management, digital marketing, and intranet portals. Exploitation could lead to unauthorized access to sensitive information, theft of user credentials, and potential lateral movement within corporate networks. This is particularly concerning for organizations handling personal data under GDPR regulations, as a successful attack could result in data breaches and regulatory penalties. Additionally, the ability to inject malicious scripts could undermine trust in corporate websites and portals, damaging brand reputation. The vulnerability's medium severity and requirement for user interaction mean that targeted phishing or social engineering campaigns could increase the risk of exploitation. Organizations in sectors such as finance, healthcare, government, and media, which rely heavily on AEM for content delivery and user engagement, may face elevated risks.

Given the absence of an official patch at this time, European organizations should implement the following specific mitigations: 1) Conduct a thorough audit of all AEM form fields and input points to identify and temporarily disable or restrict those that accept user input and could be vulnerable to script injection. 2) Implement strict Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of any injected code. 3) Employ web application firewalls (WAFs) with custom rules to detect and block common XSS payloads targeting AEM forms. 4) Educate users and administrators about the risks of clicking on suspicious links or visiting untrusted pages within the AEM environment. 5) Monitor logs and user activity for unusual behavior indicative of XSS exploitation attempts. 6) Prepare for rapid deployment of official Adobe patches once released by maintaining up-to-date asset inventories and patch management processes. 7) Consider implementing input validation and output encoding at the application level as an additional safeguard against script injection.