What is CVE-2021-42083?

CVE-2021-42083 is a high-severity vulnerability in Osnexus Quantastor, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2023-07-10.

How severe is CVE-2021-42083?

High severity. CVSS v3 base score is 8.7 out of 10.

XSS in Osnexus Quantastor

CVE-2021-42083

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 #'…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.001 (35.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N.

Affected products

Osnexus Quantastor — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.wbsec.nl/osnexus (third-party-advisory, technical-description, exploit)
csirt.divd.nl/DIVD-2021-00020/ (third-party-advisory)
www.osnexus.com/products/software-defined-storage (product)
csirt.divd.nl/CVE-2021-42083 (third-party-advisory, exploit, technical-description)

Frequently asked questions

What is CVE-2021-42083?: CVE-2021-42083 is a high-severity vulnerability in Osnexus Quantastor, classified under Cross-site Scripting. CVSS score: 8.7/10. Published 2023-07-10.
How severe is CVE-2021-42083?: High severity. CVSS v3 base score is 8.7 out of 10.