Security advisory

{
  "id": "4a5f78999bd035319fedbccb4d5fc00b779548bd508714f1d5fd8b6cbf4bc31d",
  "url": "https://osv.dev/vulnerability/CVE-2020-7707",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-7707",
    "summary": "The package property-expr before 2.0.3 are vulnerable to Prototype Pollution via the setter function.",
    "evidence": "osv:CVE-2020-7707",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2020-7707",
      "aliases": [
        "CVE-2020-7707",
        "GHSA-6fw4-hr69-g3rv"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/jquense/expr",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "9a3236c45d221969561ddb401c7a1ebae2a7c5b5"
                },
                {
                  "fixed": "df846910915d59f711ce63c1f817815bceab5ff7"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:property-expr_project:property-expr:*:*:*:*:*:node.js:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "2.0.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "df846910915d59f711ce63c1f817815bceab5ff7"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.0.2",
            "v2.0.1",
            "v2.0.0",
            "v1.5.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-7707.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:24.220320425Z",
      "provider": "osv",
      "references": [
        "https://github.com/jquense/expr/commit/df846910915d59f711ce63c1f817815bceab5ff7",
        "https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-598857",
        "https://snyk.io/vuln/SNYK-JS-PROPERTYEXPR-598800"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-7707",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 385292,
  "published_at": "2020-08-18T14:15:13.793+00:00"
}