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.
Injection
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.3 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
mitreCNA
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CVEADP
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CISA-ADPADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 39%
VendorProductVersion
postcsspostcss
𝑥
< 8.4.31
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
node-postcss
bullseye
vulnerable
bookworm
no-dsa
buster
postponed
bullseye (security)
8.2.1+~cs5.3.23-8+deb11u1
fixed
sid
8.4.49+~cs9.2.32-1
fixed
trixie
8.4.49+~cs9.2.32-1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
node-postcss
oracular
needs-triage
noble
needs-triage
mantic
ignored
lunar
ignored
jammy
needs-triage
focal
needs-triage
bionic
ignored
xenial
ignored
trusty
ignored
Common Weakness Enumeration
References
https://github.com/github/advisory-database/issues/2820
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://github.com/github/advisory-database/issues/2820
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://lists.debian.org/debian-lts-announce/2024/12/msg00025.html