CVE-2020-6144: OS4ED Opensis

Critical severity, CVSS 9.8. EPSS: 6.2% chance of exploitation in the next 30 days.

A remote code execution vulnerability exists in the install functionality of OS4Ed openSIS 7.4. The username variable which is set at line 121 in install/Step5.php allows for injection of PHP code into the Data.php file that it writes. An attacker can send an HTTP request to trigger this vulnerability.

Affected products

• OS4ED Opensis: version 7.4 only

Published 2020-09-01. Last modified 2026-06-17.