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.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| postcss(npm) | 0 | 8.4.31 | N/A |
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