medium5.3
CVE-2023-44270
PostCSS line return parsing error
Impact
An issue was discovered in PostCSS before 8.4.31. It affects linters using PostCSS to parse external Cascading Style Sheets (CSS). There may be `\r` discrepancies, as demonstrated by `@font-face{ font:(\r/*);}` in a rule. This 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 originally included in a comment.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | postcss | < 8.4.31 | 8.4.31 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Postcss | Postcss | before 8.4.31 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- 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
- https://github.com/advisories/GHSA-7fh5-64p2-3v2j
- https://nvd.nist.gov/vuln/detail/CVE-2023-44270