The glpi-screenshot-plugin allows users to take screenshots or screens recording directly from GLPI. In versions below 2.0.2, authenticated user can use the /ajax/screenshot.php endpoint to leak files from the system or use PHP wrappers. This is fixed in version 2.0.2.
https://github.com/cconard96/glpi-screenshot-plugin/security/advisories/GHSA-x6mp-jhxw-9xrp
https://github.com/cconard96/glpi-screenshot-plugin/commit/49215b53a05dc792719b69c098df80100208c2c8