CVE-2020-8289

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    CVE-2020-8289

    Published: 27 Dec 2020Last Modified: 10 Mar 2026

    Summary:

    Details: 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.

    References: , http://seclists.org/fulldisclosure/2020/Dec/57, http://seclists.org/fulldisclosure/2020/Dec/58, https://www.backblaze.com/blog/backblaze-cloud-backup-release-7-0-1/, https://hackerone.com/reports/818853, https://youtu.be/W0THXbcX5V8, https://github.com/geffner/CVE-2020-8289/blob/master/README.md

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2020-8289 | CVE-DB