What is CVE-2021-42080?

CVE-2021-42080 is a high-severity vulnerability in Osnexus Quantastor, classified under Cross-site Scripting. CVSS score: 7.4/10. Published 2023-07-10.

How severe is CVE-2021-42080?

High severity. CVSS v3 base score is 7.4 out of 10.

XSS in Osnexus Quantastor

CVE-2021-42080

An attacker is able to launch a Reflected XSS attack using a crafted URL. POC: Visit the following URL https://<IPADDRESS>:8153/qstorapi/echo?inputMessage=<img%20src=x%20onerror=alert(document.cookie)>

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (39.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/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)
csirt.divd.nl/DIVD-2021-00020/ (third-party-advisory)
www.osnexus.com/products/software-defined-storage (product)
csirt.divd.nl/CVE-2021-42080 (third-party-advisory, technical-description, exploit)

Frequently asked questions

What is CVE-2021-42080?: CVE-2021-42080 is a high-severity vulnerability in Osnexus Quantastor, classified under Cross-site Scripting. CVSS score: 7.4/10. Published 2023-07-10.
How severe is CVE-2021-42080?: High severity. CVSS v3 base score is 7.4 out of 10.