The vulnerability CVE-2025-31394 involves improper neutralization of input in the More Mime Type Filters plugin for Kailey (trepmal), resulting in stored cross-site scripting (XSS). This allows attackers to inject malicious scripts that are stored and later executed in the context of users' browsers when viewing affected pages. The CVSS 3.1 base score is 7.1, indicating high severity, with network attack vector, low attack complexity, no privileges required, user interaction required, and impacts on confidentiality, integrity, and availability. The affected versions include all up to 0.3. No patch or vendor advisory is currently available to confirm remediation status.

Successful exploitation of this stored XSS vulnerability can lead to execution of arbitrary scripts in the context of affected users, potentially resulting in theft of sensitive information, session hijacking, or other malicious actions impacting confidentiality, integrity, and availability. The CVSS score of 7.1 reflects these impacts. There are no known exploits in the wild at this time.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider disabling or limiting use of the More Mime Type Filters plugin to mitigate risk. Implementing web application firewalls (WAF) with XSS protections may help reduce exposure. Monitor vendor channels for updates and apply patches promptly once released.