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CVE-2021-4406

CRITICAL CVSS: 9.1 Published: 2023-07-10 Modified: 2026-06-17

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.

Affected Platforms

Osnexus Quantastor

Weakness Type

CWE-77, CWE-77

References