CVE-2023-44270

Name: CVE-2023-44270
Creator: NVD / NIST
Published: 2023-09-29T22:15:11.867+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.3/10EPSS 0.82%

Last modified Jun 17, 2026

CVE-2023-44270 is a medium-severity vulnerability rated 5.3/10 on the CVSS scale. An issue was discovered in PostCSS before 8.4.31. The vulnerability affects linters using PostCSS to parse external untrusted CSS. EPSS estimates a 0.82% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.3/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

EPSS Probability

0.82%

52.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-74

Affected Software

Vendor	Product	Versions
Postcss	Postcss	< 8.4.31

References

https://github.com/github/advisory-database/issues/2820Issue Tracking
https://github.com/postcss/postcss/blob/main/lib/tokenize.js#L25Issue Tracking
https://github.com/postcss/postcss/commit/58cc860b4c1707510c9cd1bc1fa30b423a9ad6c5Patch
https://github.com/postcss/postcss/releases/tag/8.4.31Patch, Release Notes
https://github.com/github/advisory-database/issues/2820Issue Tracking
https://github.com/postcss/postcss/blob/main/lib/tokenize.js#L25Issue Tracking
https://github.com/postcss/postcss/commit/58cc860b4c1707510c9cd1bc1fa30b423a9ad6c5Patch
https://github.com/postcss/postcss/releases/tag/8.4.31Patch, Release Notes
https://lists.debian.org/debian-lts-announce/2024/12/msg00025.html

Timeline

Published: Sep 29, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-44270?

How severe is CVE-2023-44270?

CVE-2023-44270 has a CVSS score of 5.3/10 (MEDIUM severity). The EPSS model estimates a 0.82% probability of exploitation in the next 30 days.

How do I fix CVE-2023-44270?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-44270?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST