CVE-2022-21704

Local log disclosure via world-readable default modes

Published Jan 19, 2022 · Updated Apr 23, 2025

Incorrect default permissions in log4js-node before 6.4.0 allow local users to read log data through Unix file access. The file and dateFile configure functions left mode unset for streamroller's 0644 default, while fileSync explicitly used 0644 when no mode was configured. Exposure requires a Unix host, use of a file-based appender without an explicit mode, and logs containing sensitive data.

CVSS severity5.5
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect default permissions in log4js-node before 6.4.0 allow local users to read log data through Unix file access. The file and dateFile configure functions left mode unset for streamroller's 0644 default, while fileSync explicitly used 0644 when no mode was configured. Exposure requires a Unix host, use of a file-based appender without an explicit mode, and logs containing sensitive data.

The record

CVE
CVE-2022-21704
Published
Jan 19, 2022
Updated
Apr 23, 2025
Vendor
log4js-node
Product
log4js-node
Classifications
CWE-276, T1005
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 19, 2022CVE publishedPublication date reported by the CVE source.
  2. Apr 23, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 6.4.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

log4js-node · log4js-nodeversion=< 6.4.0

Published CVSS scores

2.1NIST NVDAV:L/AC:L/Au:N/C:P/I:N/A:N
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
5.5GitHubCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-276Incorrect Default Permissions
T1005Data from Local System

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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