CVE-2023-44270

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.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/github/advisory-database/issues/2820	Issue Tracking
https://github.com/postcss/postcss/blob/main/lib/tokenize.js#L25	Issue Tracking
https://github.com/postcss/postcss/commit/58cc860b4c1707510c9cd1bc1fa30b423a9ad6c5	Patch
https://github.com/postcss/postcss/releases/tag/8.4.31	Patch Release Notes
https://github.com/github/advisory-database/issues/2820	Issue Tracking
https://github.com/postcss/postcss/blob/main/lib/tokenize.js#L25	Issue Tracking
https://github.com/postcss/postcss/commit/58cc860b4c1707510c9cd1bc1fa30b423a9ad6c5	Patch
https://github.com/postcss/postcss/releases/tag/8.4.31	Patch Release Notes
https://lists.debian.org/debian-lts-announce/2024/12/msg00025.html

Configurations

Configuration 1 (hide)

cpe:2.3:a:postcss:postcss:*:*:*:*:*:node.js:*:*

History

03 Nov 2025, 22:16

Type	Values Removed	Values Added
References		() https://lists.debian.org/debian-lts-announce/2024/12/msg00025.html -

Information

Published : 2023-09-29 22:15

Updated : 2025-11-03 22:16

NVD link : CVE-2023-44270

Mitre link : CVE-2023-44270

CVE.ORG link : CVE-2023-44270

JSON object : View

Products Affected

postcss

postcss

CWE

CWE-74

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

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