CVE-2025-3087 is a stored cross-site scripting (XSS) vulnerability identified in M-Files Web, a document management and workflow automation platform widely used in enterprise environments. The vulnerability affects versions from 25.1.14445.5 up to 25.2.14524.4. It stems from improper neutralization of user-supplied input during web page generation, classified under CWE-79. An authenticated user with low privileges can inject malicious JavaScript code that is stored persistently on the server and executed in the browsers of other users who view the affected content. This can lead to unauthorized actions such as session hijacking, theft of sensitive information, or execution of arbitrary commands within the context of the victim's session. The vulnerability does not require elevated privileges beyond authentication but does require user interaction to trigger the malicious script execution. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:L), user interaction required (UI:P), and low impact on confidentiality and integrity (VC:L, VI:L), with no impact on availability. No public exploits have been reported yet, but the presence of stored XSS in a widely used enterprise application presents a significant risk if weaponized. The lack of available patches at the time of reporting means organizations must rely on mitigation strategies until official fixes are released.

The primary impact of CVE-2025-3087 is on the confidentiality and integrity of data within affected M-Files Web deployments. An attacker exploiting this vulnerability can execute arbitrary scripts in the context of other users, potentially stealing session cookies, credentials, or sensitive documents. This can lead to unauthorized access, data leakage, or privilege escalation within the application. While availability is not directly impacted, successful exploitation may facilitate further attacks that degrade service or compromise system stability. Organizations relying on M-Files Web for document management and workflow automation could face operational disruptions, reputational damage, and compliance violations if sensitive information is exposed. The requirement for authentication limits the attack surface to internal or trusted users, but insider threats or compromised accounts increase risk. The medium CVSS score reflects moderate exploitability and impact, but the potential for chained attacks elevates the overall threat to enterprise environments.

1. Monitor M-Files Corporation advisories closely and apply security patches immediately once they become available to address CVE-2025-3087. 2. Implement strict input validation and output encoding on all user-supplied data fields within M-Files Web to prevent injection of malicious scripts. 3. Employ Content Security Policy (CSP) headers to restrict script execution sources and reduce the impact of XSS attacks. 4. Enforce the principle of least privilege for user accounts, limiting access rights to only what is necessary to reduce the risk from compromised credentials. 5. Conduct regular security awareness training for users to recognize and report suspicious activities or unexpected behaviors within the application. 6. Utilize web application firewalls (WAFs) with custom rules to detect and block common XSS payloads targeting M-Files Web. 7. Audit and monitor application logs for unusual input patterns or script injection attempts to enable early detection. 8. Consider isolating M-Files Web access to trusted networks or VPNs to reduce exposure to external attackers. 9. Review and harden session management mechanisms to prevent session fixation or hijacking in case of XSS exploitation.