What is CVE-2020-7856?

CVE-2020-7856 is a high-severity vulnerability in Cnesty Helpcom, classified under Improper Authentication. CVSS score: 7.5/10. Published 2021-04-20.

How severe is CVE-2020-7856?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Cnesty Helpcom

CVE-2020-7856

A vulnerability of Helpcom could allow an unauthenticated attacker to execute arbitrary command. This vulnerability exists due to insufficient authentication validation.

Vulnerability class: Broken Authentication

Published 2021-04-20 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (56.8th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Cnesty Helpcom — versions unspecified

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

www.boho.or.kr/krcert/secNoticeView.do (Third Party Advisory)

Frequently asked questions

What is CVE-2020-7856?: CVE-2020-7856 is a high-severity vulnerability in Cnesty Helpcom, classified under Improper Authentication. CVSS score: 7.5/10. Published 2021-04-20.
How severe is CVE-2020-7856?: High severity. CVSS v3 base score is 7.5 out of 10.