CVE-2021-21258: XSS injection in ajax/kanban

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-03-02 · updated 2026-06-17
Weakness: CWE-79

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 from version 9.5.0 and before version 9.5.4, there is a cross-site scripting injection vulnerability when using ajax/kanban.php. This is fixed in version 9.5.4.

Affected products

glpi-project glpi: from 9.5.0 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/commit/e7802fc051696de1f76108ea8dc3bd4e2c880f15
https://github.com/glpi-project/glpi/security/advisories/GHSA-j4xj-4qmc-mmmx
https://github.com/glpi-project/glpi/commit/e7802fc051696de1f76108ea8dc3bd4e2c880f15
https://github.com/glpi-project/glpi/security/advisories/GHSA-j4xj-4qmc-mmmx

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