CVE-2023-38881: OS4ED Opensis

Medium severity, CVSS 6.1. EPSS: 0.6% chance of exploitation in the next 30 days.

A reflected cross-site scripting (XSS) vulnerability in the Community Edition version 9.0 of OS4ED's openSIS Classic allows remote attackers to execute arbitrary JavaScript in the web browser of a user, by including a malicious payload into any of the 'calendar_id', 'school_date', 'month' or 'year' parameters in 'CalendarModal.php'.

Affected products

• OS4ED Opensis: version 9.0 only

Published 2023-11-20. Last modified 2026-06-17.