CVE-2025-46939 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 subsequently accesses the affected page containing the maliciously crafted form field, the injected script executes in their browser context. This can lead to a range of attacks including session hijacking, credential theft, unauthorized actions performed on behalf of the victim, and potentially the spread of malware. The vulnerability requires the attacker to have low privileges but does require user interaction in the form of the victim visiting the compromised page. The CVSS v3.1 base score is 5.4 (medium severity), reflecting network attack vector, low attack complexity, low privileges required, but requiring user interaction and impacting confidentiality and integrity with no impact on availability. The vulnerability scope is changed (S:C), meaning the attack can affect components beyond the initially vulnerable component. No known exploits are currently reported in the wild, and no patches have been linked yet, indicating that organizations should prioritize monitoring and mitigation to prevent exploitation once exploit code becomes available. Given AEM's role as a widely used enterprise content management system, this vulnerability poses a significant risk to organizations relying on it for web content delivery and digital asset management.

For European organizations, the impact of this vulnerability can be substantial. Adobe Experience Manager is widely used by government agencies, financial institutions, media companies, and large enterprises across Europe to manage web content and digital experiences. Exploitation of this stored XSS vulnerability could lead to unauthorized access to sensitive information, session hijacking, and manipulation of web content, undermining user trust and potentially causing reputational damage. Confidentiality breaches could expose personal data protected under GDPR, leading to regulatory penalties. The integrity of web content could be compromised, affecting business operations and customer interactions. Since the vulnerability requires user interaction, phishing or social engineering campaigns could be used to lure users to malicious pages, increasing the risk of successful exploitation. The medium severity score suggests moderate urgency, but the widespread use of AEM in critical sectors elevates the potential business impact. Additionally, the scope change means that the attack could affect other components or services integrated with AEM, broadening the potential damage.

Organizations should immediately review their Adobe Experience Manager deployments and identify instances running version 6.5.22 or earlier. Although no official patches are linked yet, organizations should monitor Adobe security advisories closely for forthcoming updates and apply patches promptly once available. In the interim, implement strict input validation and sanitization on all form fields within AEM, employing web application firewalls (WAFs) with custom rules to detect and block malicious script payloads targeting these fields. Restrict user privileges to the minimum necessary to reduce the risk of low-privileged attackers injecting malicious content. Conduct security awareness training to educate users about the risks of clicking on suspicious links or accessing untrusted content. Employ Content Security Policy (CSP) headers to limit the execution of unauthorized scripts in browsers. Regularly audit and monitor web application logs for unusual activity indicative of attempted exploitation. Consider isolating or segmenting AEM instances from critical internal networks to limit lateral movement in case of compromise. Finally, review and update incident response plans to include scenarios involving stored XSS attacks targeting web content management systems.