What is CVE-2022-21704?

CVE-2022-21704 is a medium-severity vulnerability in Log4js-Node, classified under Incorrect Default Permissions. CVSS score: 5.5/10. Published 2022-01-19.

How severe is CVE-2022-21704?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2022-21704 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Log4js-Node

CVE-2022-21704

log4js-node is a port of log4js to node.js. In affected versions default file permissions for log files created by the file, fileSync and dateFile appenders are world-readable (in unix). This could cause problems if log files contain sensitive information. This would affect any users that have not supplied their own permissions for the files via the mode parameter in the config. Users are advised to update.

Published 2022-01-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (21.0th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 21st percentile — 21.0% 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

Log4js-Node — versions < 6.4.0
Log4js Project
Debian Linux — versions 10.0

Weakness classification (CWE)

CWE-276 — Incorrect Default Permissions

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

github.com/log4js-node/log4js-node/security/advisories/GHSA-82v2-mx6x-wq7q (Patch, Third Party Advisory)
github.com/log4js-node/log4js-node/pull/1141/commits/8042252861a1b65adb66931fdf… (Patch, Third Party Advisory)
github.com/log4js-node/streamroller/pull/87 (Patch, Third Party Advisory, Issue Tracking)
github.com/log4js-node/log4js-node/blob/v6.4.0/CHANGELOG.md (Third Party Advisory, Release Notes)
lists.debian.org/debian-lts-announce/2022/12/msg00014.html (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2022-21704?: CVE-2022-21704 is a medium-severity vulnerability in Log4js-Node, classified under Incorrect Default Permissions. CVSS score: 5.5/10. Published 2022-01-19.
How severe is CVE-2022-21704?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2022-21704 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.