What is CVE-2020-8125?

CVE-2020-8125 is a critical-severity vulnerability in Klona Project, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2020-02-04.

How severe is CVE-2020-8125?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Improper input validation in Klona Project

CVE-2020-8125

Flaw in input validation in npm package klona version 1.1.0 and earlier may allow prototype pollution attack that may result in remote code execution or denial of service of applications using klona.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2020-02-04 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.041 (90.5th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 90.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.041 · newest: 0.041 · change: 0.000

Affected products

Klona Project
Klona Npm Module — versions Fixed Version: v1.1.1

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

hackerone.com/reports/778414 (Exploit, Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2020-8125?: CVE-2020-8125 is a critical-severity vulnerability in Klona Project, classified under Improper Input Validation. CVSS score: 9.8/10. Published 2020-02-04.
How severe is CVE-2020-8125?: Critical severity. CVSS v3 base score is 9.8 out of 10.