Vulnerability-Lookup

GHSA-XG68-CHX2-253G

Vulnerability from github – Published: 2021-05-24 19:53 – Updated: 2025-08-14 22:15

Summary

Prototype Pollution in jquery-deparam

Details

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in jquery-deparam allows a malicious user to inject properties into Object.prototype.

Severity

8.8 (High)


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

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{
  "affected": [
    {
      "package": {
        "ecosystem": "npm",
        "name": "jquery-deparam"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "0.5.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2021-20087"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-1321"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2021-05-20T21:58:11Z",
    "nvd_published_at": "2021-04-23T18:15:00Z",
    "severity": "HIGH"
  },
  "details": "Improperly Controlled Modification of Object Prototype Attributes (\u0027Prototype Pollution\u0027) in jquery-deparam allows a malicious user to inject properties into Object.prototype.",
  "id": "GHSA-xg68-chx2-253g",
  "modified": "2025-08-14T22:15:23Z",
  "published": "2021-05-24T19:53:01Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-20087"
    },
    {
      "type": "WEB",
      "url": "https://github.com/BlackFan/client-side-prototype-pollution/blob/master/pp/jquery-deparam.md"
    },
    {
      "type": "WEB",
      "url": "https://github.com/RetireJS/retire.js/blob/6da45fcb6a3425e55ee8181b2ac35168879bf086/repository/jsrepository-master.json#L824-L842"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Prototype Pollution in jquery-deparam"
}

CVE-2021-20087 (GCVE-0-2021-20087)

Vulnerability from cvelistv5 – Published: 2021-04-23 17:58 – Updated: 2025-08-14 20:55

Summary

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in jquery-deparam 0.5.1 allows a malicious user to inject properties into Object.prototype.

Severity

No CVSS data available.

CWE

Prototype Pollution

Assigner

tenable mitre root

References

2 references

URL	Tags
https://github.com/BlackFan/client-side-prototype…	x_refsource_MISC
https://github.com/RetireJS/retire.js/blob/6da45f…

Impacted products

1 product

Vendor	Product	Version
n/a	jquery-deparam	Affected: 0.5.1

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2025-08-14T20:55:35.525Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "url": "https://github.com/RetireJS/retire.js/blob/6da45fcb6a3425e55ee8181b2ac35168879bf086/repository/jsrepository-master.json#L824-L842"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://github.com/BlackFan/client-side-prototype-pollution/blob/master/pp/jquery-deparam.md"
          }
        ],
        "title": "CVE Program Container",
        "x_generator": {
          "engine": "ADPogram 0.0.1"
        }
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "jquery-deparam",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "0.5.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Improperly Controlled Modification of Object Prototype Attributes (\u0027Prototype Pollution\u0027) in jquery-deparam 0.5.1 allows a malicious user to inject properties into Object.prototype."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "Prototype Pollution",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2021-04-23T17:58:23.000Z",
        "orgId": "5ac1ecc2-367a-4d16-a0b2-35d495ddd0be",
        "shortName": "tenable"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/BlackFan/client-side-prototype-pollution/blob/master/pp/jquery-deparam.md"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "vulnreport@tenable.com",
          "ID": "CVE-2021-20087",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "jquery-deparam",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "0.5.1"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "Improperly Controlled Modification of Object Prototype Attributes (\u0027Prototype Pollution\u0027) in jquery-deparam 0.5.1 allows a malicious user to inject properties into Object.prototype."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "Prototype Pollution"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://github.com/BlackFan/client-side-prototype-pollution/blob/master/pp/jquery-deparam.md",
              "refsource": "MISC",
              "url": "https://github.com/BlackFan/client-side-prototype-pollution/blob/master/pp/jquery-deparam.md"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "5ac1ecc2-367a-4d16-a0b2-35d495ddd0be",
    "assignerShortName": "tenable",
    "cveId": "CVE-2021-20087",
    "datePublished": "2021-04-23T17:58:23.000Z",
    "dateReserved": "2020-12-17T00:00:00.000Z",
    "dateUpdated": "2025-08-14T20:55:35.525Z",
    "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.