PT-2023-7567 · Postcss+1 · Postcss+1

Published 2023-09-29 · Updated 2026-06-04 · CVE-2023-44270

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions PostCSS versions prior to 8.4.31

Description The issue affects linters using PostCSS to parse external untrusted CSS. An attacker can prepare CSS in such a way that it will contain 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 originally included in a comment. This may lead to discrepancies, as demonstrated by @font-face{ font:(r/*);} in a rule. The vulnerability exists due to the lack of measures to neutralize special elements, which may allow a remote attacker to execute arbitrary code.

Recommendations For PostCSS versions prior to 8.4.31, update to version 8.4.31 or later to resolve the issue. As a temporary workaround, consider restricting the use of PostCSS to parse external untrusted CSS until a patch is available. Avoid using PostCSS to process CSS that contains potentially malicious comments.

Fix

Special Elements Injection

Weakness Enumeration

CWE-144

CWE-74

Related Identifiers

BDU:2023-08623

CVE-2023-44270

DLA-4003-1

GHSA-7FH5-64P2-3V2J

OPENSUSE-SU-2025:14663-1

Affected Products

Debian

Postcss

References · 51

• https://github.com/postcss/postcss/releases/tag/8.4.31 · Patch
• https://github.com/postcss/postcss/commit/58cc860b4c1707510c9cd1bc1fa30b423a9ad6c5 · Patch
• https://osv.dev/vulnerability/openSUSE-SU-2025:14663-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-44270 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-44270 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2023-44270 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-44270 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-44270 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2023-44270 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-08623 · Security Note
• https://osv.dev/vulnerability/DLA-4003-1 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-APP-NPM-CVE-2023-44270 · Vendor Advisory
• https://ubuntu.com/security/CVE-2023-44270 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-7fh5-64p2-3v2j · Vendor Advisory
• https://github.com/postcss/postcss · Note