This vulnerability in typps Calendarista Basic Edition (versions up to 3.0.2) is caused by improper neutralization of input during web page generation, resulting in a cross-site scripting (XSS) flaw. The CVSS 3.1 base score is 7.1, indicating a high severity issue with network attack vector, low attack complexity, no privileges required, but requiring user interaction. The vulnerability impacts confidentiality, integrity, and availability. No patch or official remediation guidance is currently available from the vendor, and the product is not a cloud service.

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary scripts in the context of the affected web application, potentially leading to information disclosure, modification of data, or disruption of service. The CVSS vector indicates that the attack can be performed remotely without privileges but requires user interaction. The impact affects confidentiality, integrity, and availability at a low level each.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official patch or workaround is currently available, users should monitor vendor communications for updates. Until a fix is released, consider restricting access to the affected application or employing web application firewalls that can detect and block XSS attempts.