GHSA-7FH5-64P2-3V2J

Vulnerability from github – Published: 2023-09-30 00:31 – Updated: 2025-11-04 16:45
VLAI?
Summary
PostCSS line return parsing error
Details

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.

Severity ?
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Show details on source website
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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "postcss"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "8.4.31"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2023-44270"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-144",
      "CWE-74"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2023-10-03T15:04:58Z",
    "nvd_published_at": "2023-09-29T22:15:11Z",
    "severity": "MODERATE"
  },
  "details": "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.\n\nThis 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.",
  "id": "GHSA-7fh5-64p2-3v2j",
  "modified": "2025-11-04T16:45:01Z",
  "published": "2023-09-30T00:31:10Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-44270"
    },
    {
      "type": "WEB",
      "url": "https://github.com/github/advisory-database/issues/2820"
    },
    {
      "type": "WEB",
      "url": "https://github.com/postcss/postcss/commit/58cc860b4c1707510c9cd1bc1fa30b423a9ad6c5"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/postcss/postcss"
    },
    {
      "type": "WEB",
      "url": "https://github.com/postcss/postcss/blob/main/lib/tokenize.js#L25"
    },
    {
      "type": "WEB",
      "url": "https://github.com/postcss/postcss/releases/tag/8.4.31"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2024/12/msg00025.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "PostCSS line return parsing error"
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.