What is CVE-2022-21211?

CVE-2022-21211 is a medium-severity vulnerability in Posix Project, classified under CWE-252. CVSS score: 5.9/10. Published 2022-06-10.

How severe is CVE-2022-21211?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Posix Project

CVE-2022-21211

This affects all versions of package posix. When invoking the toString method, it will fallback to 0x0 value, as the value of toString is not invokable (not a function), and then it will crash with type-check.

Published 2022-06-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.010 (62.9th percentile), scored 2026-10-04.

Low probability of exploitation in the next 30 days, but still tracked. 63rd percentile — 62.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Posix Project
Posix — versions 0

Weakness classification (CWE)

CWE-252

References

snyk.io/vuln/SNYK-JS-POSIX-2400719 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2022-21211?: CVE-2022-21211 is a medium-severity vulnerability in Posix Project, classified under CWE-252. CVSS score: 5.9/10. Published 2022-06-10.
How severe is CVE-2022-21211?: Medium severity. CVSS v3 base score is 5.9 out of 10.