CVE-2021-21313

Name: CVE-2021-21313
Creator: NVD / NIST
Published: 2021-03-03T20:15:12.2+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.92%

Last modified Jun 17, 2026

CVE-2021-21313 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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. EPSS estimates a 0.92% chance of exploitation in the next 30 days.

Description

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&#.

Metrics

CVSS 3.1

6.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS Probability

0.92%

55.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Glpi-Project	Glpi	< 9.5.4

References

https://github.com/glpi-project/glpi/releases/tag/9.5.4Release Notes, Third Party Advisory
https://github.com/glpi-project/glpi/security/advisories/GHSA-h4hj-mrpg-xfgxThird Party Advisory
https://github.com/glpi-project/glpi/releases/tag/9.5.4Release Notes, Third Party Advisory
https://github.com/glpi-project/glpi/security/advisories/GHSA-h4hj-mrpg-xfgxThird Party Advisory

Timeline

Published: Mar 3, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21313?

How severe is CVE-2021-21313?

CVE-2021-21313 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.92% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21313?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-21313?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST