Vulnerability-Lookup

GHSA-7FH5-64P2-3V2J

Vulnerability from github – Published: 2023-09-30 00:31 – Updated: 2025-11-04 16:45

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

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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"
}

CVE-2023-44270 (GCVE-0-2023-44270)

Vulnerability from cvelistv5 – Published: 2023-09-29 00:00 – Updated: 2025-11-03 21:49

Summary

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.

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-23 16:38 UTC

CWE

Assigner

mitre mitre root

References

5 references

URL	Tags
https://github.com/postcss/postcss/blob/main/lib/…
https://github.com/postcss/postcss/releases/tag/8.4.31
https://github.com/postcss/postcss/commit/58cc860…
https://github.com/github/advisory-database/issues/2820
https://lists.debian.org/debian-lts-announce/2024…

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-11-03T21:49:45.559Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/postcss/postcss/blob/main/lib/tokenize.js#L25"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/postcss/postcss/releases/tag/8.4.31"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/postcss/postcss/commit/58cc860b4c1707510c9cd1bc1fa30b423a9ad6c5"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/github/advisory-database/issues/2820"
          },
          {
            "url": "https://lists.debian.org/debian-lts-announce/2024/12/msg00025.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2023-44270",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-23T16:38:23.948037Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-23T16:38:49.069Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2023-10-10T12:48:52.698Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "url": "https://github.com/postcss/postcss/blob/main/lib/tokenize.js#L25"
        },
        {
          "url": "https://github.com/postcss/postcss/releases/tag/8.4.31"
        },
        {
          "url": "https://github.com/postcss/postcss/commit/58cc860b4c1707510c9cd1bc1fa30b423a9ad6c5"
        },
        {
          "url": "https://github.com/github/advisory-database/issues/2820"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2023-44270",
    "datePublished": "2023-09-29T00:00:00.000Z",
    "dateReserved": "2023-09-28T00:00:00.000Z",
    "dateUpdated": "2025-11-03T21:49:45.559Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.