An issue in OS4ED openSIS v8.0 through v9.1 allows attackers to execute a directory traversal by sending a crafted POST request to /Modules.php?modname=messaging/Inbox.php&modfunc=save&filename.

Open Solutions for Education, Inc openSIS Community Edition v8.0 and earlier is vulnerable to SQL Injection via CalendarModal.php.

A SQL injection vulnerability exists in version 8.0 of openSIS when MySQL or MariaDB is used as the application database. An attacker can then issue the SQL command through the /opensis/modules/grades/InputFinalGrades.php, period parameter.

A SQL injection vulnerability exists in version 8.0 of openSIS when MySQL or MariaDB is used as the application database. An attacker can then issue the SQL command through the /opensis/modules/users/Staff.php, staff{TITLE] parameter.

A SQL injection vulnerability exists in version 8.0 of openSIS when MySQL or MariaDB is used as the application database. An attacker can then issue the SQL command through the /opensis/functions/GetStuListFnc.php &Grade= parameter.

OS4ED openSIS 8.0 is affected by cross-site scripting (XSS) in EmailCheckOthers.php. An attacker can inject JavaScript code to get the user's cookie and take over the working session of user.

OS4ED openSIS 8.0 is affected by SQL Injection in CheckDuplicateName.php, which can extract information from the database.

OS4ED openSIS 8.0 is affected by SQL injection in ChooseCpSearch.php, ChooseRequestSearch.php. An attacker can inject a SQL query to extract information from the database.

Due to lack of protection, parameter studentid in OpenSIS Classic 8.0 /modules/eligibility/Student.php can be used to inject SQL queries to extract information from databases.