CVE-2021-40309: OS4ED Opensis

High severity, CVSS 8.8. EPSS: 1.8% chance of exploitation in the next 30 days.

A SQL injection vulnerability exists in the Take Attendance functionality of OS4Ed's OpenSIS 8.0. allows an attacker to inject their own SQL query. The cp_id_miss_attn parameter from TakeAttendance.php is vulnerable to SQL injection. An attacker can make an authenticated HTTP request as a user with access to "Take Attendance" functionality to trigger this vulnerability.

Affected products

• OS4ED Opensis: version 8.0 only

Published 2021-09-24. Last modified 2026-06-17.