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

Vulnerability from cvelistv5 – Published: 2023-09-29 00:00 – Updated: 2025-11-03 21:49
VLAI
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 (v2.0.3)
CWE
  • n/a
Assigner
References
Show details on NVD website
To clipboard 

{
  "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",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2023-44270",
      "date": "2026-07-22",
      "epss": "0.00822",
      "percentile": "0.53484"
    },
    "microsoft_vex": {
      "current_release_date": "2026-02-18T02:58:25.000Z",
      "cve": "CVE-2023-44270",
      "id": "msrc_CVE-2023-44270",
      "initial_release_date": "2023-09-01T00:00:00.000Z",
      "product_status:known_not_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "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.",
      "url": "https://msrc.microsoft.com/csaf/vex/2023/msrc_cve-2023-44270.json",
      "version": "2"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2023-44270\",\"sourceIdentifier\":\"cve@mitre.org\",\"published\":\"2023-09-29T22:15:11.867\",\"lastModified\":\"2026-06-17T06:27:15.690\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"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.\"},{\"lang\":\"es\",\"value\":\"Se descubri\u00f3 un problema en PostCSS antes de la versi\u00f3n 8.4.31. La vulnerabilidad afecta a los linters que utilizan PostCSS para analizar CSS externos que no son de confianza. Un atacante puede preparar CSS de tal manera que contenga partes analizadas por PostCSS como un comentario CSS. Despu\u00e9s del procesamiento por PostCSS, se incluir\u00e1 en la salida de PostCSS en los nodos CSS (reglas, propiedades) a pesar de estar incluido en un comentario.\"}],\"affected\":[{\"source\":\"cve@mitre.org\",\"affectedData\":[{\"vendor\":\"n/a\",\"product\":\"n/a\",\"versions\":[{\"version\":\"n/a\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N\",\"baseScore\":5.3,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":3.9,\"impactScore\":1.4}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-09-23T16:38:23.948037Z\",\"id\":\"CVE-2023-44270\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"yes\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-74\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:postcss:postcss:*:*:*:*:*:node.js:*:*\",\"versionEndExcluding\":\"8.4.31\",\"matchCriteriaId\":\"FB38A6C8-B41F-41C9-9093-E46BAC3B54CB\"}]}]}],\"references\":[{\"url\":\"https://github.com/github/advisory-database/issues/2820\",\"source\":\"cve@mitre.org\",\"tags\":[\"Issue Tracking\"]},{\"url\":\"https://github.com/postcss/postcss/blob/main/lib/tokenize.js#L25\",\"source\":\"cve@mitre.org\",\"tags\":[\"Issue Tracking\"]},{\"url\":\"https://github.com/postcss/postcss/commit/58cc860b4c1707510c9cd1bc1fa30b423a9ad6c5\",\"source\":\"cve@mitre.org\",\"tags\":[\"Patch\"]},{\"url\":\"https://github.com/postcss/postcss/releases/tag/8.4.31\",\"source\":\"cve@mitre.org\",\"tags\":[\"Patch\",\"Release Notes\"]},{\"url\":\"https://github.com/github/advisory-database/issues/2820\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Issue Tracking\"]},{\"url\":\"https://github.com/postcss/postcss/blob/main/lib/tokenize.js#L25\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Issue Tracking\"]},{\"url\":\"https://github.com/postcss/postcss/commit/58cc860b4c1707510c9cd1bc1fa30b423a9ad6c5\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://github.com/postcss/postcss/releases/tag/8.4.31\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\",\"Release Notes\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/12/msg00025.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-18T20:23:55+00:00",
      "cve": "CVE-2023-44270",
      "id": "CVE-2023-44270",
      "initial_release_date": "2023-09-29T00:00:00+00:00",
      "product_status:fixed": "102",
      "product_status:known_affected": "74",
      "product_status:known_not_affected": "893",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "PostCSS: Improper input validation in PostCSS",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-44270.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"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\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/12/msg00025.html\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-03T21:49:45.559Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-44270\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-23T16:38:23.948037Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-23T16:38:38.654Z\"}}], \"cna\": {\"affected\": [{\"vendor\": \"n/a\", \"product\": \"n/a\", \"versions\": [{\"status\": \"affected\", \"version\": \"n/a\"}]}], \"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\"}], \"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\": [{\"lang\": \"en\", \"type\": \"text\", \"description\": \"n/a\"}]}], \"providerMetadata\": {\"orgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"shortName\": \"mitre\", \"dateUpdated\": \"2023-10-10T12:48:52.698Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-44270\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-03T21:49:45.559Z\", \"dateReserved\": \"2023-09-28T00:00:00.000Z\", \"assignerOrgId\": \"8254265b-2729-46b6-b9e3-3dfca2d5bfca\", \"datePublished\": \"2023-09-29T00:00:00.000Z\", \"assignerShortName\": \"mitre\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.