i-Educar is free, fully online school management software. In versions 2.10.0 and prior, an authenticated time-based SQL injection vulnerability exists in the ieducar/intranet/funcionario_vinculo_cad.php script. An attacker with access to an authenticated session can execute arbitrary SQL commands against the application's database. This vulnerability is caused by the improper handling of the cod_funcionario_vinculo GET parameter, which is directly concatenated into an SQL query without proper sanitization. This issue has been patched in commit a00dfa3.
https://github.com/portabilis/i-educar/security/advisories/GHSA-8rv6-x8h9-fjfc
https://github.com/portabilis/i-educar/commit/a00dfa3f129bc84e27873aa01cbd3f82e5b6c6c8