CVE-2021-21312

Stored XSS on documents

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 within the document upload function (Home > Management > Documents > Add, or /front/document.form.php endpoint), indeed one of the form field: "Web Link" is not properly sanitized and a malicious user (who has document upload rights) can use it to deliver JavaScript payload. For example if you use the following payload: " accesskey="x" onclick="alert(1)" x=", the content will be saved within the database without any control. And then once you return to the summary documents page, by clicking on the "Web Link" of the newly created file it will create a new empty tab, but on the initial tab the pop-up "1" will appear.

Category

5.4
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.32%
Third-Party Advisory github.com Third-Party Advisory github.com
Affected: glpi-project glpi
Published at:
Updated at:

References

Link Tags
https://github.com/glpi-project/glpi/releases/tag/9.5.4 third party advisory release notes
https://github.com/glpi-project/glpi/security/advisories/GHSA-c7f6-3mr7-3rq2 third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-21312?
CVE-2021-21312 has been scored as a medium severity vulnerability.
How to fix CVE-2021-21312?
To fix CVE-2021-21312, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-21312 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-21312 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-21312?
CVE-2021-21312 affects glpi-project glpi.
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