HIGH

CVE-2021-40309

CVSS v3

8.8

HIGH

EPSS Score

1.8 %

exploit probability, as of 2026-10-19

CISA KEV

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Neither OSV.dev nor the vendor advisories we read list affected versions for CVE-2021-40309 yet.

Full record on NVD

Description

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.

Technical details

Published: 2021-09-24

Frequently asked questions

What is CVE-2021-40309?

Is CVE-2021-40309 actively exploited?

Active exploitation of CVE-2021-40309 has not been confirmed. Its EPSS score was 1.8% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2021-40309?

CVE-2021-40309 has a CVSS v3 base score of 8.8 (HIGH severity).

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