{"api_version":"1","generated_at":"2026-07-23T13:40:21+00:00","cve":"CVE-2020-7637","urls":{"html":"https://cve.report/CVE-2020-7637","api":"https://cve.report/api/cve/CVE-2020-7637.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2020-7637","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-7637"},"summary":{"title":"CVE-2020-7637","description":"class-transformer before 0.3.1 allow attackers to perform Prototype Pollution. The classToPlainFromExist function could be tricked into adding or modifying properties of Object.prototype using a __proto__ payload.","state":"PUBLIC","assigner":"report@snyk.io","published_at":"2020-04-06 13:15:00","updated_at":"2022-12-02 19:58:00"},"problem_types":["CWE-1321"],"metrics":[],"references":[{"url":"https://snyk.io/vuln/SNYK-JS-CLASSTRANSFORMER-564431","name":"https://snyk.io/vuln/SNYK-JS-CLASSTRANSFORMER-564431","refsource":"MISC","tags":["Exploit","Third Party Advisory"],"title":"Prototype Pollution in class-transformer | Snyk","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://github.com/typestack/class-transformer/commit/8f04eb9db02de708f1a20f6f2d2bb309b2fed01e","name":"https://github.com/typestack/class-transformer/commit/8f04eb9db02de708f1a20f6f2d2bb309b2fed01e","refsource":"MISC","tags":[],"title":"Fix prototype pollution vulnerabilities · typestack/class-transformer@8f04eb9 · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-7637","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-7637","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2020","cve_id":"7637","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"class-transformer_project","cpe5":"class-transformer","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"node.js","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"7637","vulnerable":"1","versionEndIncluding":"0.2.3","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"class-transformer_project","cpe5":"class-transformer","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"node.js","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2020-7637","qid":"981894","title":"Nodejs (npm) Security Update for class-transformer (GHSA-6gp3-h3jj-prx4)"}]},"source_records":{"cve_program":{"data_type":"CVE","data_format":"MITRE","data_version":"4.0","CVE_data_meta":{"ID":"CVE-2020-7637","ASSIGNER":"report@snyk.io","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"vendor_name":"n/a","product":{"product_data":[{"product_name":"class-transformer","version":{"version_data":[{"version_value":"All versions prior to version 0.3.1"}]}}]}}]}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"Prototype Pollution"}]}]},"references":{"reference_data":[{"refsource":"MISC","name":"https://github.com/typestack/class-transformer/commit/8f04eb9db02de708f1a20f6f2d2bb309b2fed01e","url":"https://github.com/typestack/class-transformer/commit/8f04eb9db02de708f1a20f6f2d2bb309b2fed01e"},{"refsource":"MISC","name":"https://snyk.io/vuln/SNYK-JS-CLASSTRANSFORMER-564431","url":"https://snyk.io/vuln/SNYK-JS-CLASSTRANSFORMER-564431"}]},"description":{"description_data":[{"lang":"eng","value":"class-transformer before 0.3.1 allow attackers to perform Prototype Pollution. The classToPlainFromExist function could be tricked into adding or modifying properties of Object.prototype using a __proto__ payload."}]}},"nvd":{"publishedDate":"2020-04-06 13:15:00","lastModifiedDate":"2022-12-02 19:58:00","problem_types":["CWE-1321"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"LOW","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM"},"exploitabilityScore":3.9,"impactScore":1.4},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:L/Au:N/C:N/I:P/A:N","accessVector":"NETWORK","accessComplexity":"LOW","authentication":"NONE","confidentialityImpact":"NONE","integrityImpact":"PARTIAL","availabilityImpact":"NONE","baseScore":5},"severity":"MEDIUM","exploitabilityScore":10,"impactScore":2.9,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":false}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:class-transformer_project:class-transformer:*:*:*:*:*:node.js:*:*","versionEndExcluding":"0.3.1","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2020","CveId":"7637","Ordinal":"167918","Title":"CVE-2020-7637","CVE":"CVE-2020-7637","Year":"2020"},"notes":[{"CveYear":"2020","CveId":"7637","Ordinal":"1","NoteData":"class-transformer before 0.3.1 allow attackers to perform Prototype Pollution. The classToPlainFromExist function could be tricked into adding or modifying properties of Object.prototype using a __proto__ payload.","Type":"Description","Title":null},{"CveYear":"2020","CveId":"7637","Ordinal":"2","NoteData":"2020-04-06","Type":"Other","Title":"Published"},{"CveYear":"2020","CveId":"7637","Ordinal":"3","NoteData":"2020-08-05","Type":"Other","Title":"Modified"}]}}}