GLPI stands for Gestionnaire Libre de Parc Informatique is a Free Asset and IT Management Software package, that provides ITIL Service Desk features, licenses tracking and software auditing. An unauthenticated user can enumerate users logins. Users are advised to upgrade to version 10.0.10. There are no known workarounds for this vulnerability.
https://github.com/glpi-project/glpi/security/advisories/GHSA-5cf4-6q6r-49x9