This vulnerability (CVE-2025-23616) in Steve Canalplan canalplan-ac is a reflected cross-site scripting (XSS) issue caused by improper input neutralization during web page generation. It affects Canalplan versions up to 5.31. The CVSS 3.1 base score is 7.1, indicating a high severity with network attack vector, low attack complexity, no privileges required, user interaction required, and impacts on confidentiality, integrity, and availability. No patch or vendor advisory is currently provided, and no exploits are known in the wild.

Successful exploitation of this reflected XSS vulnerability could allow an attacker to execute arbitrary scripts in the context of the victim's browser session, potentially leading to theft of sensitive information, session hijacking, or other malicious actions impacting confidentiality, integrity, and availability to a limited extent. However, no active exploitation has been reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch is available, users should consider implementing web application firewall (WAF) rules to detect and block reflected XSS payloads and apply input validation and output encoding as interim mitigations where possible.