CVE-2021-21313: Improper Neutralization of Special Elements in Output Used by a Downstream Component

GLPI is open source software which stands for Gestionnaire Libre de Parc Informatique and it is a Free Asset and IT Management Software package. In GLPI before verison 9.5.4, there is a vulnerability in the /ajax/common.tabs.php endpoint, indeed, at least two parameters target and id are not...