CVE-2021-4406

high

Description

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.

References

https://www.osnexus.com/products/software-defined-storage

https://www.divd.nl/DIVD-2021-00020

https://csirt.divd.nl/cves/CVE-2021-4406/

https://csirt.divd.nl/DIVD-2021-00020/

https://csirt.divd.nl/CVE-2021-4406

Details

Source: Mitre, NVD

Published: 2023-07-10

Updated: 2025-09-24

Risk Information

CVSS v2

Base Score: 8.3

Vector: CVSS2#AV:N/AC:L/Au:M/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 7.2

Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Severity: High

EPSS

EPSS: 0.00051