What is CVE-2020-7771?

CVE-2020-7771 is a high-severity vulnerability in Asciitable.js Project, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 7.5/10. Published 2021-01-04.

How severe is CVE-2020-7771?

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

Prototype Pollution in Asciitable.js Project

CVE-2020-7771

The package asciitable.js before 1.0.3 are vulnerable to Prototype Pollution via the main function.

Vulnerability class: Prototype Pollution

Published 2021-01-04 · last modified 2026-06-17.

CVSS v3 metric

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

EPSS exploit prediction

EPSS: 0.020 (79.6th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 79.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.019 · newest: 0.020 · change: +0.000

Affected products

Asciitable.js Project
Asciitable.js — versions unspecified

Weakness classification (CWE)

CWE-1321 — Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution)

References

snyk.io/vuln/SNYK-JS-ASCIITABLEJS-1039799 (Exploit, Third Party Advisory)
github.com/victornpb/asciitable.js/pull/1 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2020-7771?: CVE-2020-7771 is a high-severity vulnerability in Asciitable.js Project, classified under Improperly Controlled Modification of Object Prototype Attributes (Prototype Pollution). CVSS score: 7.5/10. Published 2021-01-04.
How severe is CVE-2020-7771?: High severity. CVSS v3 base score is 7.5 out of 10.