VULNERABILITY INTELLIGENCE

CVE-2020-8289

CVSS score7.8 HIGH

EPSS probability4.70%

CISA KEVNot currently listed

Published2020-12-27

Last modified2026-06-17

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

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.

Weakness classification

support@hackerone.com: CWE-295
nvd@nist.gov: CWE-295

Primary references

support@hackerone.com — Mailing List, Third Party Advisory
support@hackerone.com — Mailing List, Third Party Advisory
support@hackerone.com — Exploit, Third Party Advisory
support@hackerone.com — Permissions Required
support@hackerone.com — Third Party Advisory
support@hackerone.com — Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Permissions Required
af854a3a-2127-422b-91ae-364da2661108 — Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory