CVE-2025-46900 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 the affected page containing the malicious input, the injected script executes in their browser context. This can lead to unauthorized actions such as session hijacking, credential theft, or performing actions on behalf of the victim user within the scope of the vulnerable application. The vulnerability requires low privileges to exploit but does require user interaction, as the victim must visit the compromised page. 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 scope is changed (S:C), indicating that the vulnerability can affect resources beyond the vulnerable component, potentially impacting confidentiality and integrity but not availability. No known exploits are currently reported in the wild, and no official patches have been linked yet. Given the widespread use of Adobe Experience Manager in enterprise content management and digital experience delivery, this vulnerability poses a significant risk to organizations relying on AEM for their web presence and internal portals.

For European organizations, the impact of this stored XSS vulnerability can be substantial. Many enterprises, government agencies, and public institutions in Europe utilize Adobe Experience Manager to manage websites, intranets, and customer portals. Exploitation could lead to unauthorized access to sensitive information, including personal data protected under GDPR, thereby risking regulatory penalties and reputational damage. Attackers could leverage the vulnerability to conduct phishing campaigns, steal session cookies, or perform actions impersonating legitimate users, potentially leading to data breaches or unauthorized transactions. The persistent nature of stored XSS increases the risk of widespread impact, as multiple users may be exposed once the malicious script is stored. Additionally, the vulnerability could be used as a foothold for further attacks within the network, especially if combined with social engineering or other attack vectors. The medium CVSS score suggests moderate risk, but the potential for data confidentiality and integrity compromise makes it a serious concern for organizations handling sensitive or regulated data.

To mitigate CVE-2025-46900, European organizations should prioritize the following actions: 1) Apply official patches or updates from Adobe as soon as they become available to address the vulnerability directly. 2) Implement strict input validation and output encoding on all user-supplied data within AEM forms and content fields to prevent script injection. 3) Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers, limiting the impact of any injected code. 4) Conduct thorough security reviews and penetration testing of AEM deployments to identify and remediate any residual XSS or related vulnerabilities. 5) Educate users and administrators about the risks of XSS and encourage cautious behavior when interacting with unfamiliar or suspicious content. 6) Monitor web application logs and user activity for signs of exploitation attempts or anomalous behavior. 7) Consider deploying Web Application Firewalls (WAF) with rules tailored to detect and block XSS payloads targeting AEM. These measures, combined with timely patching, will significantly reduce the risk posed by this vulnerability.