What is CVE-2021-30071?

CVE-2021-30071 is a medium-severity vulnerability in Hestiacp Control Panel, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-08-18.

How severe is CVE-2021-30071?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Hestiacp Control Panel

CVE-2021-30071

A cross-site scripting (XSS) vulnerability in /admin/list_key.html of HestiaCP before v1.3.5 allows attackers to execute arbitrary web scripts or HTML via a crafted payload.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2022-08-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.006 (45.2th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 45th percentile — 45.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000

Affected products

Hestiacp Control Panel

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/hestiacp/hestiacp/commit/706314c12872c7607e96a73dfc77dbbddad2875e (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2021-30071?: CVE-2021-30071 is a medium-severity vulnerability in Hestiacp Control Panel, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2022-08-18.
How severe is CVE-2021-30071?: Medium severity. CVSS v3 base score is 6.1 out of 10.