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CVE-2023-44270

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Date: September 28, 2023

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.

Language: JS

Severity Score

Related Resources (8)

https://github.com/postcss/postcss
https://github.com/postcss/postcss/blob/main/lib/tokenize.js#L25
https://github.com/postcss/postcss/commit/58cc860b4c1707510c9cd1bc1fa30b423a9ad6c5
https://github.com/postcss/postcss/releases/tag/8.4.31
https://security-tracker.debian.org/tracker/CVE-2023-44270
https://nvd.nist.gov/vuln/detail/CVE-2023-44270
https://github.com/github/advisory-database/issues/2820
https://www.mend.io/vulnerability-database/CVE-2023-44270

Severity Score

Weakness Type (CWE)

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

CWE-74

Improper Neutralization of Line Delimiters

CWE-144

Top Fix

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Upgrade Version

Upgrade to version postcss - 8.4.31

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): LOW
Availability (A): NONE

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