CVE-2021-4406

An authenticated attacker is able to create alerts that trigger a stored XSS attack. POC * go to the alert manager * open the ITSM tab * add a webhook with the URL/service token value ' -h && id | tee /tmp/ttttttddddssss #' (whitespaces are tab characters) * click add * click apply * create a test alert * The test alert will run the command “id | tee /tmp/ttttttddddssss” as root. * after the test alert inspect /tmp/ttttttddddssss it'll contain the ids of the root user.

CVSS v3 9.1 CRITICAL

9.1^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 2.3 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://csirt.divd.nl/CVE-2021-4406	Third Party Advisory
https://csirt.divd.nl/DIVD-2021-00020/
https://www.osnexus.com/products/software-defined-storage	Product
https://csirt.divd.nl/CVE-2021-4406	Third Party Advisory
https://www.divd.nl/DIVD-2021-00020
https://www.osnexus.com/products/software-defined-storage	Product
https://csirt.divd.nl/cves/CVE-2021-4406/

Configurations

Configuration 1 (hide)

cpe:2.3:a:osnexus:quantastor:*:*:*:*:*:*:*:*

History

24 Sep 2025, 14:15

Type	Values Removed	Values Added
References		() https://csirt.divd.nl/cves/CVE-2021-4406/ -

22 Sep 2025, 07:15

Type	Values Removed	Values Added
Summary	~~(en) An administrator is able to execute commands as root via the alerts management dialog~~	(en) An authenticated attacker is able to create alerts that trigger a stored XSS attack. POC * go to the alert manager * open the ITSM tab * add a webhook with the URL/service token value ' -h && id \| tee /tmp/ttttttddddssss #' (whitespaces are tab characters) * click add * click apply * create a test alert * The test alert will run the command “id \| tee /tmp/ttttttddddssss” as root. * after the test alert inspect /tmp/ttttttddddssss it'll contain the ids of the root user.

Information

Published : 2023-07-10 16:15

Updated : 2025-09-24 14:15

NVD link : CVE-2021-4406

Mitre link : CVE-2021-4406

CVE.ORG link : CVE-2021-4406

JSON object : View

Products Affected

osnexus

quantastor

CWE

CWE-77

Improper Neutralization of Special Elements used in a Command ('Command Injection')

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