Vulnerability-Lookup

GHSA-P28H-CC7Q-C4FG

Vulnerability from github – Published: 2022-10-01 00:00 – Updated: 2025-05-20 21:02

Summary

css-what vulnerable to ReDoS due to use of insecure regular expression

Details

The package css-what before 2.1.3 is vulnerable to Regular Expression Denial of Service (ReDoS) due to the use of insecure regular expression in the re_attr variable of index.js. The exploitation of this vulnerability could be triggered via the parse function.

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Show details on source website

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "css-what"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.1.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2022-21222"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1333",
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2022-10-04T21:11:32Z",
    "nvd_published_at": "2022-09-30T05:15:00Z",
    "severity": "HIGH"
  },
  "details": "The package css-what before 2.1.3 is vulnerable to Regular Expression Denial of Service (ReDoS) due to the use of insecure regular expression in the `re_attr` variable of index.js. The exploitation of this vulnerability could be triggered via the parse function.",
  "id": "GHSA-p28h-cc7q-c4fg",
  "modified": "2025-05-20T21:02:33Z",
  "published": "2022-10-01T00:00:24Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-21222"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fb55/css-what/commit/dc510929790da6617e7aa93a616498b22f6a6b72"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/fb55/css-what"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fb55/css-what/blob/a38effd5a8f5506d75c7f8f13cbd8c76248a3860/index.js#23L12"
    },
    {
      "type": "WEB",
      "url": "https://github.com/fb55/css-what/blob/a38effd5a8f5506d75c7f8f13cbd8c76248a3860/index.js%23L12"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2023/03/msg00001.html"
    },
    {
      "type": "WEB",
      "url": "https://security.snyk.io/vuln/SNYK-JS-CSSWHAT-3035488"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "css-what vulnerable to ReDoS due to use of insecure regular expression"
}

CVE-2022-21222 (GCVE-0-2022-21222)

Vulnerability from cvelistv5 – Published: 2022-09-30 05:05 – Updated: 2025-05-20 16:04

Title

Regular Expression Denial of Service (ReDoS)

Summary

The package css-what before 2.1.3 are vulnerable to Regular Expression Denial of Service (ReDoS) due to the usage of insecure regular expression in the re_attr variable of index.js. The exploitation of this vulnerability could be triggered via the parse function.

Severity

5.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P

SSVC

Exploitation: poc Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-05-20 16:03 UTC

CWE

Regular Expression Denial of Service (ReDoS)
CWE-1333 - Inefficient Regular Expression Complexity

Assigner

snyk mitre root

References

3 references

URL	Tags
https://security.snyk.io/vuln/SNYK-JS-CSSWHAT-3035488
https://github.com/fb55/css-what/blob/a38effd5a8f…
https://lists.debian.org/debian-lts-announce/2023…	mailing-list

Impacted products

1 product

Vendor	Product	Version
n/a	css-what	Affected: unspecified , < 2.1.3 (custom)

Date Public

2022-09-30 00:00

Credits

Snyk Research Team

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T02:31:59.016Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://security.snyk.io/vuln/SNYK-JS-CSSWHAT-3035488"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://github.com/fb55/css-what/blob/a38effd5a8f5506d75c7f8f13cbd8c76248a3860/index.js%23L12"
          },
          {
            "name": "[debian-lts-announce] 20230303 [SECURITY] [DLA 3350-1] node-css-what security update",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2023/03/msg00001.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2022-21222",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-05-20T16:03:52.139564Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-1333",
                "description": "CWE-1333 Inefficient Regular Expression Complexity",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-05-20T16:04:07.202Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "css-what",
          "vendor": "n/a",
          "versions": [
            {
              "lessThan": "2.1.3",
              "status": "affected",
              "version": "unspecified",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Snyk Research Team"
        }
      ],
      "datePublic": "2022-09-30T00:00:00.000Z",
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          "lang": "en",
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 5.3,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "exploitCodeMaturity": "PROOF_OF_CONCEPT",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "remediationLevel": "NOT_DEFINED",
            "reportConfidence": "NOT_DEFINED",
            "scope": "UNCHANGED",
            "temporalScore": 5,
            "temporalSeverity": "MEDIUM",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P",
            "version": "3.1"
          }
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      ],
      "problemTypes": [
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      "providerMetadata": {
        "dateUpdated": "2023-03-03T00:00:00.000Z",
        "orgId": "bae035ff-b466-4ff4-94d0-fc9efd9e1730",
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      },
      "references": [
        {
          "url": "https://security.snyk.io/vuln/SNYK-JS-CSSWHAT-3035488"
        },
        {
          "url": "https://github.com/fb55/css-what/blob/a38effd5a8f5506d75c7f8f13cbd8c76248a3860/index.js%23L12"
        },
        {
          "name": "[debian-lts-announce] 20230303 [SECURITY] [DLA 3350-1] node-css-what security update",
          "tags": [
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      ],
      "title": "Regular Expression Denial of Service (ReDoS)"
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  "cveMetadata": {
    "assignerOrgId": "bae035ff-b466-4ff4-94d0-fc9efd9e1730",
    "assignerShortName": "snyk",
    "cveId": "CVE-2022-21222",
    "datePublished": "2022-09-30T05:05:11.059Z",
    "dateReserved": "2022-02-24T00:00:00.000Z",
    "dateUpdated": "2025-05-20T16:04:07.202Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

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.