CVE-2021-39377

9.8 criticalEPSS 3.6%

Critical (9.8) in os4ed opensis. EPSS 3.6% chance of exploitation in the next 30 days.

A SQL Injection vulnerability exists in openSIS 8.0 when MySQL (MariaDB) is being used as the application database. A malicious attacker can issue SQL commands to the MySQL (MariaDB) database through the index.php username parameter.

Severity

CVSS 3.1

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 3.6% chance of exploitation in the next 30 days; higher than 89% of CVEs (scores of 2026-10-31)
CWE: CWE-89
Published: 2021-09-01
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

os4ed:opensis

References

https://github.com/OS4ED/openSIS-Classic
https://github.com/security-n/CVE-2021-39377
https://opensis.com/
https://github.com/OS4ED/openSIS-Classic
https://github.com/security-n/CVE-2021-39377

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