Open Solutions for Education, Inc openSIS Community Edition v8.0 and earlier is vulnerable to SQL Injection via CalendarModal.php.
https://github.com/OS4ED/openSIS-Classic/commit/81799fd1de74d7b4bf3c4c37ad6042214e48a469
https://github.com/OS4ED/openSIS-Classic
https://ccat.gitbook.io/cyber-sec/cve/cve-2022-45962-postauth-sqli