{"id":"CVE-2020-8290","aliases":["EUVD-2020-29158","GHSA-mfc8-4qmg-g3x6"],"status":"published","title":"Backblaze for Windows and Backblaze for macOS before 7.0.0.439 suffer from improper privilege...","description":"Backblaze for Windows and Backblaze for macOS before 7.0.0.439 suffer from improper privilege management in `bztransmit` helper due to lack of permission handling and validation before creation of client update directories allowing for local escalation of privilege via rogue client update binary.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00589,"percentile":0.48442,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-269"],"published":"2020-12-27T01:22:39Z","modified":"2026-06-17T03:26:13Z","exploits":[{"source":"pocgithub","id":"geffner/CVE-2020-8290","title":"geffner/CVE-2020-8290","date":"2020-09-09","url":"https://github.com/geffner/CVE-2020-8290"}],"products":[{"vendor":"backblaze","product":"backblaze"}],"references":[{"url":"https://hackerone.com/reports/818857","tags":["x_refsource_MISC","x_transferred","Permissions Required"]},{"url":"https://youtu.be/OpC6neWd2aM","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://github.com/geffner/CVE-2020-8290/blob/master/README.md","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-8290"},{"url":"https://github.com/advisories/GHSA-mfc8-4qmg-g3x6"}],"sources":{"cve":[{"id":"CVE-2020-8290","description":"Backblaze for Windows and Backblaze for macOS before 7.0.0.439 suffer from improper privilege management in `bztransmit` helper due to lack of permission handling and validation before creation of client update directories allowing for local escalation of privilege via rogue client update binary.","status":"published","published":"2020-12-27T01:22:39Z","modified":"2024-08-04T09:56:28.299Z","cwes":["CWE-269"],"updated_at":"2026-11-02T14:35:50.545879Z"}],"euvd":[{"id":"EUVD-2020-29158","description":"Backblaze for Windows and Backblaze for macOS before 7.0.0.439 suffer from improper privilege management in `bztransmit` helper due to lack of permission handling and validation before creation of client update directories allowing for local escalation of privilege via rogue client update binary.","status":"published","published":"2020-12-27T01:22:39Z","modified":"2024-08-04T09:56:28Z","updated_at":"2026-11-03T03:07:57.599144Z"}],"ghsa":[{"id":"GHSA-mfc8-4qmg-g3x6","title":"Backblaze for Windows and Backblaze for macOS before 7.0.0.439 suffer from improper privilege...","description":"Backblaze for Windows and Backblaze for macOS before 7.0.0.439 suffer from improper privilege management in `bztransmit` helper due to lack of permission handling and validation before creation of client update directories allowing for local escalation of privilege via rogue client update binary.","status":"published","published":"2022-05-24T17:37:30Z","modified":"2023-01-29T05:05:52Z","cwes":["CWE-269"],"updated_at":"2026-11-02T14:45:53.730969Z"}],"nvd":[{"id":"CVE-2020-8290","description":"Backblaze for Windows and Backblaze for macOS before 7.0.0.439 suffer from improper privilege management in `bztransmit` helper due to lack of permission handling and validation before creation of client update directories allowing for local escalation of privilege via rogue client update binary.","status":"published","published":"2020-12-27T02:15:14.573Z","modified":"2026-06-17T03:26:13.947Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":4.6,"vector":"AV:L/AC:L/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-269"],"updated_at":"2026-11-02T14:06:28.340168Z"}]}}