{"id":"UBUNTU-CVE-2021-21313","details":"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 properly sanitized. Here are two payloads (due to two different exploitations depending on which parameter you act) to exploit the vulnerability:/ajax/common.tabs.php?_target=javascript:alert(document.cookie)&_itemtype=DisplayPreference&_glpi_tab=DisplayPreference$2&id=258&displaytype=Ticket (Payload triggered if you click on the button). /ajax/common.tabs.php?_target=/front/ticket.form.php&_itemtype=Ticket&_glpi_tab=Ticket$1&id=(){};(function%20(){alert(document.cookie);})();function%20a&#.","modified":"2025-10-24T04:50:06Z","published":"2021-03-03T20:15:00Z","upstream":["CVE-2021-21313"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-21313"},{"type":"REPORT","url":"https://github.com/glpi-project/glpi/security/advisories/GHSA-h4hj-mrpg-xfgx"},{"type":"REPORT","url":"https://github.com/glpi-project/glpi/releases/tag/9.5.4"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-21313"}],"affected":[{"package":{"name":"glpi","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/glpi@0.84.8+dfsg.1-1ubuntu1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.84.8+dfsg.1-1","0.84.8+dfsg.1-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"glpi","binary_version":"0.84.8+dfsg.1-1ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-21313.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}