CVE-2020-6637: OS4ED Opensis

Critical severity, CVSS 9.8. EPSS: 20.1% chance of exploitation in the next 30 days.

openSIS Community Edition version 7.3 is vulnerable to SQL injection via the USERNAME parameter of index.php.

Affected products

• OS4ED Opensis: version 7.3 only

Published 2020-08-24. Last modified 2026-06-17.