CVE-2025-46870 is a stored DOM-based 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 environment. When a victim user accesses a page containing the compromised form field, the injected script executes in their browser context. This type of XSS is classified under CWE-79 and specifically involves the Document Object Model (DOM), meaning the malicious payload is executed as a result of client-side script processing of unsafe data. The vulnerability requires low privileges to exploit and user interaction (visiting the affected page) to trigger the malicious script execution. The CVSS v3.1 base score is 5.4, indicating a medium severity level. The vector string (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N) shows that the attack can be performed remotely over the network with low attack complexity, requires low privileges, and user interaction is necessary. The scope is changed, meaning the vulnerability affects components beyond the initially vulnerable component. The impact affects confidentiality and integrity but not availability. No known exploits are currently reported in the wild, and no official patches or mitigation links have been provided yet. Adobe Experience Manager is a widely used enterprise content management system, often deployed by large organizations for managing digital assets and web content, making this vulnerability significant in environments where AEM is used to serve content to internal or external users.

For European organizations, the impact of this vulnerability can be substantial, especially for those relying on Adobe Experience Manager for critical web content management. Exploitation could lead to unauthorized script execution in users' browsers, enabling attackers to steal session tokens, perform actions on behalf of users, or redirect users to malicious sites. This compromises user confidentiality and data integrity, potentially leading to data breaches or reputational damage. Organizations in sectors such as government, finance, healthcare, and media, which often use AEM for public-facing or internal portals, are particularly at risk. The vulnerability could also facilitate phishing campaigns or lateral movement within networks if attackers leverage stolen credentials or session information. Given the medium severity and the requirement for user interaction, the threat is moderate but should not be underestimated, especially in environments with high-value targets or sensitive data. The lack of known exploits in the wild currently reduces immediate risk but also means organizations should proactively address the vulnerability before it is weaponized.

To mitigate this vulnerability effectively, European organizations should: 1) Immediately audit all AEM instances to identify versions 6.5.22 or earlier and prioritize their upgrade to the latest secure version once Adobe releases a patch. 2) Implement strict input validation and output encoding on all form fields within AEM to prevent injection of malicious scripts, focusing on sanitizing user-supplied data before it is processed or rendered in the DOM. 3) Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers, limiting the impact of any injected malicious code. 4) Conduct regular security assessments and penetration testing focusing on web application vulnerabilities, including DOM-based XSS. 5) Educate users about the risks of clicking on suspicious links and visiting untrusted pages, as user interaction is required for exploitation. 6) Monitor web logs and user activity for unusual behaviors that may indicate exploitation attempts. 7) Isolate AEM environments from critical internal networks where possible to limit lateral movement in case of compromise. 8) Stay informed on Adobe security advisories for official patches or workarounds and apply them promptly.