CVE-2022-21704: log4js-node is a port of log4js to node.js

Routine

MEDIUM 5.5WATCHLISTUPGRADEMITIGATE

CVE-2022-21704 is a medium-severity flaw (CVSS 5.5) affecting log4js, debian linux. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 78%)
CISA exploited list	No
Weakness	CWE-276
Published	2022-01-19
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: debian · log4js project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-01-19 23:15 UTCPublished CVE record published
2026-06-17 04:26 UTCUpdated Record last modified

log4js project log4js UPGRADE

Affected: < 6.4.0

Fixed in: 6.4.0

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls log4js

2. UPGRADE to 6.4.0

npm install log4js@">=6.4.0"

debian debian linux MITIGATE

Affected: 10.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 10.0

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-21704?

log4js: upgrade to 6.4.0; debian linux: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2022-21704 being exploited?

CVE-2022-21704 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-21704 affect?

CVE-2022-21704 affects log4js, debian linux. Severity is medium (CVSS 5.5). 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 sensit

How urgent is CVE-2022-21704?

Priority 30/100. On your watchlist

Software pages

Node.js vulnerabilities · Debian vulnerabilities

References

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