CVE-2021-21255

Name: CVE-2021-21255
Creator: NVD / NIST
Published: 2021-03-02T20:15:14.537+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.7/10EPSS 0.85%

Last modified Jun 17, 2026

CVE-2021-21255 is a medium-severity vulnerability rated 5.7/10 on the CVSS scale. GLPI is an open-source asset and IT management software package that provides ITIL Service Desk features, licenses tracking and software auditing. In GLPI version 9.5.3, it was possible to switch entities with IDOR from a logged in user. EPSS estimates a 0.85% chance of exploitation in the next 30 days.

Description

GLPI is an open-source asset and IT management software package that provides ITIL Service Desk features, licenses tracking and software auditing. In GLPI version 9.5.3, it was possible to switch entities with IDOR from a logged in user. This is fixed in version 9.5.4.

Metrics

CVSS 3.1

5.7/10

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

EPSS Probability

0.85%

53.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Glpi-Project	Glpi	9.5.3

References

https://github.com/glpi-project/glpi/commit/aade65b7f67d46f23d276a8acb0df70651c3b1dcPatch, Third Party Advisory
https://github.com/glpi-project/glpi/security/advisories/GHSA-v3m5-r3mx-ff9jThird Party Advisory
https://github.com/glpi-project/glpi/commit/aade65b7f67d46f23d276a8acb0df70651c3b1dcPatch, Third Party Advisory
https://github.com/glpi-project/glpi/security/advisories/GHSA-v3m5-r3mx-ff9jThird Party Advisory

Timeline

Published: Mar 2, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21255?

How severe is CVE-2021-21255?

CVE-2021-21255 has a CVSS score of 5.7/10 (MEDIUM severity). The EPSS model estimates a 0.85% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21255?

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-2021-21255?

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

Scan your code now

Source: NVD / NIST