CVE-2021-21326: Horizontal Privilege Escalation

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-03-08 · updated 2026-06-17
Weakness: CWE-862

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 before version 9.5.4 it is possible to create tickets for another user with self-service interface without delegatee systems enabled. This is fixed in version 9.5.4.

Affected products

glpi-project glpi: before 9.5.4 — fixed in 9.5.4

How to fix

Upgrade to a fixed version: glpi-project glpi 9.5.4. Check the vendor advisory for mitigations.

References

https://github.com/glpi-project/glpi/releases/tag/9.5.4
https://github.com/glpi-project/glpi/security/advisories/GHSA-vmj9-cg56-p7wh
https://github.com/glpi-project/glpi/releases/tag/9.5.4
https://github.com/glpi-project/glpi/security/advisories/GHSA-vmj9-cg56-p7wh

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