{"api_version":"1","generated_at":"2026-07-23T10:57:13+00:00","cve":"CVE-2020-8289","urls":{"html":"https://cve.report/CVE-2020-8289","api":"https://cve.report/api/cve/CVE-2020-8289.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2020-8289","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-8289"},"summary":{"title":"CVE-2020-8289","description":"Backblaze for Windows before 7.0.1.433 and Backblaze for macOS before 7.0.1.434 suffer from improper certificate validation in `bztransmit` helper due to hardcoded whitelist of strings in URLs where validation is disabled leading to possible remote code execution via client update functionality.","state":"PUBLIC","assigner":"support@hackerone.com","published_at":"2020-12-27 02:15:00","updated_at":"2020-12-31 19:04:00"},"problem_types":["CWE-295"],"metrics":[],"references":[{"url":"http://seclists.org/fulldisclosure/2020/Dec/58","name":"20201229 Re: CVE-2020-8150 - Remote Code Execution as SYSTEM/root via Backblaze","refsource":"FULLDISC","tags":["Mailing List","Third Party Advisory"],"title":"Full Disclosure: Re: CVE-2020-8150 – Remote Code Execution as SYSTEM/root via Backblaze","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://youtu.be/W0THXbcX5V8","name":"https://youtu.be/W0THXbcX5V8","refsource":"MISC","tags":["Exploit","Third Party Advisory"],"title":"CVE-2020-8289 – Remote Code Execution as SYSTEM/root via Backblaze (Windows PoC) - YouTube","mime":"text/html","httpstatus":"200","archivestatus":"404"},{"url":"https://hackerone.com/reports/818853","name":"https://hackerone.com/reports/818853","refsource":"MISC","tags":["Permissions Required"],"title":"HackerOne","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://github.com/geffner/CVE-2020-8289/blob/master/README.md","name":"https://github.com/geffner/CVE-2020-8289/blob/master/README.md","refsource":"MISC","tags":["Exploit","Third Party Advisory"],"title":"CVE-2020-8289/README.md at master · geffner/CVE-2020-8289 · GitHub","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"http://seclists.org/fulldisclosure/2020/Dec/57","name":"20201229 Re: [FD] CVE-2020-8150 - Remote Code Execution as SYSTEM/root via Backblaze","refsource":"FULLDISC","tags":["Mailing List","Third Party Advisory"],"title":"Full Disclosure: Re: [FD]\tCVE-2020-8150 – Remote Code Execution as SYSTEM/root via Backblaze","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.backblaze.com/blog/backblaze-cloud-backup-release-7-0-1/","name":"https://www.backblaze.com/blog/backblaze-cloud-backup-release-7-0-1/","refsource":"MISC","tags":["Third Party Advisory"],"title":"Backblaze Cloud Backup Release 7.0.1","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-8289","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-8289","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2020","cve_id":"8289","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"backblaze","cpe5":"backblaze","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"macos","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"8289","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"backblaze","cpe5":"backblaze","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"windows","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"8289","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"backblaze","cpe5":"backblaze","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"macos","cpe12":"*","cpe13":"*"},{"cve_year":"2020","cve_id":"8289","vulnerable":"1","versionEndIncluding":"1","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"backblaze","cpe5":"backblaze","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"windows","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"data_type":"CVE","data_format":"MITRE","data_version":"4.0","CVE_data_meta":{"ID":"CVE-2020-8289","ASSIGNER":"support@hackerone.com","STATE":"PUBLIC"},"affects":{"vendor":{"vendor_data":[{"vendor_name":"n/a","product":{"product_data":[{"product_name":"Backblaze","version":{"version_data":[{"version_value":"Backblaze for Windows before 7.0.1.433 and Backblaze for macOS before 7.0.1.434"}]}}]}}]}},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"Improper Certificate Validation (CWE-295)"}]}]},"references":{"reference_data":[{"refsource":"MISC","name":"https://hackerone.com/reports/818853","url":"https://hackerone.com/reports/818853"},{"refsource":"MISC","name":"https://youtu.be/W0THXbcX5V8","url":"https://youtu.be/W0THXbcX5V8"},{"refsource":"MISC","name":"https://github.com/geffner/CVE-2020-8289/blob/master/README.md","url":"https://github.com/geffner/CVE-2020-8289/blob/master/README.md"},{"refsource":"MISC","name":"https://www.backblaze.com/blog/backblaze-cloud-backup-release-7-0-1/","url":"https://www.backblaze.com/blog/backblaze-cloud-backup-release-7-0-1/"},{"refsource":"FULLDISC","name":"20201229 Re: [FD] CVE-2020-8150 - Remote Code Execution as SYSTEM/root via Backblaze","url":"http://seclists.org/fulldisclosure/2020/Dec/57"},{"refsource":"FULLDISC","name":"20201229 Re: CVE-2020-8150 - Remote Code Execution as SYSTEM/root via Backblaze","url":"http://seclists.org/fulldisclosure/2020/Dec/58"}]},"description":{"description_data":[{"lang":"eng","value":"Backblaze for Windows before 7.0.1.433 and Backblaze for macOS before 7.0.1.434 suffer from improper certificate validation in `bztransmit` helper due to hardcoded whitelist of strings in URLs where validation is disabled leading to possible remote code execution via client update functionality."}]}},"nvd":{"publishedDate":"2020-12-27 02:15:00","lastModifiedDate":"2020-12-31 19:04:00","problem_types":["CWE-295"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9},"baseMetricV2":{"cvssV2":{"version":"2.0","vectorString":"AV:N/AC:M/Au:N/C:C/I:C/A:C","accessVector":"NETWORK","accessComplexity":"MEDIUM","authentication":"NONE","confidentialityImpact":"COMPLETE","integrityImpact":"COMPLETE","availabilityImpact":"COMPLETE","baseScore":9.3},"severity":"HIGH","exploitabilityScore":8.6,"impactScore":10,"acInsufInfo":false,"obtainAllPrivilege":false,"obtainUserPrivilege":false,"obtainOtherPrivilege":false,"userInteractionRequired":true}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:backblaze:backblaze:*:*:*:*:*:macos:*:*","versionEndExcluding":"7.0.1.434","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:backblaze:backblaze:*:*:*:*:*:windows:*:*","versionEndExcluding":"7.0.1.433","cpe_name":[]}]}]}},"legacy_mitre":{"record":{"CveYear":"2020","CveId":"8289","Ordinal":"168626","Title":"CVE-2020-8289","CVE":"CVE-2020-8289","Year":"2020"},"notes":[{"CveYear":"2020","CveId":"8289","Ordinal":"1","NoteData":"Backblaze for Windows before 7.0.1.433 and Backblaze for macOS before 7.0.1.434 suffer from improper certificate validation in `bztransmit` helper due to hardcoded whitelist of strings in URLs where validation is disabled leading to possible remote code execution via client update functionality.","Type":"Description","Title":null},{"CveYear":"2020","CveId":"8289","Ordinal":"2","NoteData":"2020-12-26","Type":"Other","Title":"Published"},{"CveYear":"2020","CveId":"8289","Ordinal":"3","NoteData":"2020-12-29","Type":"Other","Title":"Modified"}]}}}