cvedb.io
CVE-2021-4406
CRITICAL · CVSS 9.1
EPSS exploitation probability: 0%
Published 2023-07-10T16:15:47.747 · Last modified 2026-06-17T04:19:41.547

Summary

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 products

osnexus — quantastor

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.