CVE-2025-46882 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 the affected page containing the injected script, the malicious code 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 launched remotely over the network with low attack complexity, requires low privileges, and user interaction (visiting the page) is necessary. The scope is changed, indicating the vulnerability affects resources beyond the initially vulnerable component. The impact includes limited confidentiality and integrity loss, with no direct availability impact. No known exploits are currently reported in the wild, and no patches have been linked yet. Stored XSS in a widely used enterprise content management system like AEM can lead to session hijacking, credential theft, or unauthorized actions performed in the context of the victim user, potentially compromising sensitive corporate data or administrative functions.

For European organizations using Adobe Experience Manager, this vulnerability poses a significant risk to web application security and user trust. A successful exploit could allow attackers to execute arbitrary scripts in the browsers of employees, customers, or partners accessing AEM-managed sites. This may lead to theft of session cookies, enabling unauthorized access to internal systems or administrative interfaces. Confidential information displayed or managed via AEM could be exposed or manipulated, undermining data integrity. Given AEM's role in managing digital assets and content for many enterprises, including government and financial institutions in Europe, exploitation could disrupt business operations and damage reputations. The requirement for low privileges to inject scripts means insider threats or compromised accounts could be leveraged easily. The need for user interaction (visiting the malicious page) limits automated mass exploitation but targeted spear-phishing or social engineering campaigns could be effective. The vulnerability's medium severity suggests it is a moderate but actionable threat, especially in environments with high-value data or strict compliance requirements such as GDPR.

European organizations should prioritize the following specific mitigation steps: 1) Immediately identify and inventory all AEM instances, confirming versions and patch status. 2) Apply official Adobe patches or updates as soon as they become available; monitor Adobe security advisories closely. 3) Implement strict input validation and output encoding on all form fields within AEM to prevent script injection, using context-aware encoding libraries. 4) Employ Content Security Policy (CSP) headers to restrict execution of unauthorized scripts and reduce impact of XSS attacks. 5) Restrict user privileges within AEM to the minimum necessary, limiting the ability of low-privileged users to inject content. 6) Conduct regular security assessments and penetration testing focused on web application vulnerabilities, including stored XSS. 7) Educate users about the risks of clicking untrusted links and implement browser security features such as anti-XSS filters. 8) Monitor web server and application logs for unusual input patterns or error messages indicative of attempted exploitation. 9) Consider deploying Web Application Firewalls (WAF) with custom rules to detect and block XSS attack payloads targeting AEM. These measures combined will reduce the risk of exploitation and limit potential damage.