What is CVE-2021-47873?

CVE-2021-47873 is a high-severity vulnerability in Vestacp, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-01-21.

How severe is CVE-2021-47873?

High severity. CVSS v3 base score is 7.2 out of 10.

XSS in Vestacp

CVE-2021-47873

VestaCP versions prior to 0.9.8-25 contain a cross-site scripting vulnerability in the IP interface configuration that allows attackers to inject malicious scripts. Attackers can exploit the 'v_interface' parameter by sending a crafted POST request to the add/ip/ endpoint with a stored XSS payload.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (9.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N.

Affected products

Vestacp — versions 0.9.8

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

disclosure@vulncheck.com (exploit)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2021-47873?: CVE-2021-47873 is a high-severity vulnerability in Vestacp, classified under Cross-site Scripting. CVSS score: 7.2/10. Published 2026-01-21.
How severe is CVE-2021-47873?: High severity. CVSS v3 base score is 7.2 out of 10.