What is CVE-2020-7781?

CVE-2020-7781 is a critical-severity vulnerability in Connection-Tester Project, classified under OS Command Injection. CVSS score: 9.8/10. Published 2020-12-16.

How severe is CVE-2020-7781?

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

RCE in Connection-Tester Project

CVE-2020-7781

This affects the package connection-tester before 0.2.1. The injection point is located in line 15 in index.js. The following PoC demonstrates the vulnerability:

Vulnerability class: Command Injection (OS Command Injection)

Published 2020-12-16 · 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: 0.020 (79.9th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 79.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: +0.000

Affected products

Connection-Tester Project
Connection-Tester — versions unspecified

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

snyk.io/vuln/SNYK-JS-CONNECTIONTESTER-1048337 (Exploit, Third Party Advisory)
github.com/skoranga/node-connection-tester/pull/10 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2020-7781?: CVE-2020-7781 is a critical-severity vulnerability in Connection-Tester Project, classified under OS Command Injection. CVSS score: 9.8/10. Published 2020-12-16.
How severe is CVE-2020-7781?: Critical severity. CVSS v3 base score is 9.8 out of 10.