CVE-2023-44270

PostCSS: Improper input validation in PostCSS

Published Sep 29, 2023 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Description
An issue was discovered in PostCSS before 8.4.31. The vulnerability affects linters using PostCSS to parse external untrusted CSS. An attacker can prepare CSS in such a way that it will contains parts parsed by PostCSS as a CSS comment. After processing by PostCSS, it will be included in the PostCSS output in CSS nodes (rules, properties) despite being included in a comment.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-4003-1 node-postcss security update
EUVD EUVD EUVD-2023-2456 An issue was discovered in PostCSS before 8.4.31. The vulnerability affects linters using PostCSS to parse external untrusted CSS. An attacker can prepare CSS in such a way that it will contains parts parsed by PostCSS as a CSS comment. After processing by PostCSS, it will be included in the PostCSS output in CSS nodes (rules, properties) despite being included in a comment.
Github GHSA Github GHSA GHSA-7fh5-64p2-3v2j PostCSS line return parsing error
History
Type Values Removed Values Added
Metrics epss

{'score': 0.00109}

epss

{'score': 0.00141}

Type Values Removed Values Added
First Time appeared Redhat openshift Gitops
CPEs cpe:/a:redhat:openshift_gitops:1.14::el8
Vendors & Products Redhat openshift Gitops
Type Values Removed Values Added
CPEs cpe:/a:redhat:openshift_data_foundation:4.18::el9
Type Values Removed Values Added
CPEs cpe:/a:redhat:openshift_data_foundation:4.14::el9
cpe:/a:redhat:openshift_data_foundation:4.15::el9
Type Values Removed Values Added
First Time appeared Redhat openshift Data Foundation
CPEs cpe:/a:redhat:openshift_data_foundation:4.16::el9
cpe:/a:redhat:openshift_data_foundation:4.17::el9
Vendors & Products Redhat openshift Data Foundation
Type Values Removed Values Added
First Time appeared Redhat discovery
Redhat openshift Devspaces
CPEs cpe:/a:redhat:openshift_devspaces:3::el9
cpe:/o:redhat:discovery:1.0::el9
Vendors & Products Redhat discovery
Redhat openshift Devspaces
Type Values Removed Values Added
First Time appeared Redhat service Mesh
CPEs cpe:/a:redhat:service_mesh:2.5::el8
Vendors & Products Redhat service Mesh
Type Values Removed Values Added
First Time appeared Redhat
Redhat openshift
CPEs cpe:/a:redhat:openshift:4.17::el9
Vendors & Products Redhat
Redhat openshift
Type Values Removed Values Added
Title PostCSS: Improper input validation in PostCSS
Weaknesses CWE-93
References
Metrics threat_severity

None

threat_severity

Moderate

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
Nov 3, 2025, 9:49 PM
Reserved
Sep 28, 2023, 12:00 AM
Status
Modified
Published
Sep 29, 2023, 10:15 PM
Modified
Jun 17, 2026, 6:27 AM
Severity
Moderate
Public date
Sep 29, 2023, 12:00 AM