CVE-2023-44270
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
Debian Fixed 5 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 8.4.31+~cs8.0.26-1 |
| sid | Fixed | 8.4.31+~cs8.0.26-1 |
| forky | Fixed | 8.4.31+~cs8.0.26-1 |
| bullseye | Fixed | 8.2.1+~cs5.3.23-8+deb11u1 |
| bookworm | Fixed | 8.4.20+~cs8.0.23-1+deb12u1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| npm | postcss | <8.4.31 | 8.4.31 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2023-44270
- https://github.com/github/advisory-database/issues/2820
- https://github.com/postcss/postcss/commit/58cc860b4c1707510c9cd1bc1fa30b423a9ad6c5
- https://github.com/postcss/postcss
- https://github.com/postcss/postcss/blob/main/lib/tokenize.js#L25
- https://github.com/postcss/postcss/releases/tag/8.4.31
- https://lists.debian.org/debian-lts-announce/2024/12/msg00025.html
- https://security-tracker.debian.org/tracker/CVE-2023-44270
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.