CVE-2021-21312

Stored XSS on documents

Severity Score

4.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

GLPI es un software de código abierto que significa Gestionnaire Libre de Parc Informatique y es un paquete gratuito de Software de Gestión de Activos y TI. En GLPI anterior a la versión 9.5.4, se presenta una vulnerabilidad dentro de la función de carga de documentos (Home ) Management ) Documents ) Add, o el archivo /front/document.form.php endpoint), de hecho, uno de los campos de formulario: "Web Link" es no está debidamente saneado y un usuario malicioso (que tiene derechos de carga de documentos) puede usarlo para entregar la carga útil de JavaScript. Por ejemplo, si usa la siguiente carga útil: " accesskey="x" onclick="alert(1)" x=", el contenido se guardará dentro de la base de datos sin ningún control. Y luego, una vez que regrese a la página de documentos resumen, al hacer clic en el "Web Link" del archivo recién creado, se creará una nueva pestaña vacía, pero en la pestaña inicial aparecerá la ventana emergente "1"

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

High

Privileges Required

High

User Interaction

Required

Scope

Changed

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

Medium

Authentication

Single

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2020-12-22 CVE Reserved
2021-03-03 CVE Published
2024-08-03 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

CAPEC

References (2)

URL	Tag	Source
https://github.com/glpi-project/glpi/releases/tag/9.5.4	Release Notes
https://github.com/glpi-project/glpi/security/advisories/GHSA-c7f6-3mr7-3rq2	Third Party Advisory

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Glpi-project Search vendor "Glpi-project"		Glpi Search vendor "Glpi-project" for product "Glpi"				< 9.5.4 Search vendor "Glpi-project" for product "Glpi" and version " < 9.5.4"		-		Affected