What is CVE-2017-18869?

CVE-2017-18869 is a low-severity vulnerability in Chownr Project, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 2.5/10. Published 2020-06-15.

How severe is CVE-2017-18869?

Low severity. CVSS v3 base score is 2.5 out of 10.

Vulnerability in Chownr Project

CVE-2017-18869

A TOCTOU issue in the chownr package before 1.1.0 for Node.js 10.10 could allow a local attacker to trick it into descending into unintended directories via symlink attacks.

Vulnerability class: TOCTOU (Time-of-Check to Time-of-Use)

Published 2020-06-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 2.5 (Low). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (24.5th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 24.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Chownr Project

Weakness classification (CWE)

CWE-367 — Time-of-check Time-of-use (TOCTOU) Race Condition

References

github.com/isaacs/chownr/issues/14 (Third Party Advisory)
bugs.debian.org/cgi-bin/bugreport.cgi (Third Party Advisory)
bugzilla.redhat.com/show_bug.cgi (Permissions Required)
snyk.io/vuln/npm:chownr:20180731 (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2017-18869?: CVE-2017-18869 is a low-severity vulnerability in Chownr Project, classified under Time-of-check Time-of-use (TOCTOU) Race Condition. CVSS score: 2.5/10. Published 2020-06-15.
How severe is CVE-2017-18869?: Low severity. CVSS v3 base score is 2.5 out of 10.