CVE-2020-26299

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    CVE-2020-26299

    Published: 10 Feb 2021Last Modified: 27 Aug 2026

    Summary:

    Details: ftp-srv is an open-source FTP server designed to be simple yet configurable. In ftp-srv before version 4.4.0 there is a path-traversal vulnerability. Clients of FTP servers utilizing ftp-srv hosted on Windows machines can escape the FTP user's defined root folder using the expected FTP commands, for example, CWD and UPDR. When windows separators exist within the path (`\`), `path.resolve` leaves the upper pointers intact and allows the user to move beyond the root folder defined for that user. We did not take that into account when creating the path resolve function. The issue is patched in version 4.4.0 (commit 457b859450a37cba10ff3c431eb4aa67771122e3).

    References: https://www.npmjs.com/package/ftp-srv, https://github.com/autovance/ftp-srv/commit/457b859450a37cba10ff3c431eb4aa67771122e3, https://github.com/autovance/ftp-srv/issues/167, https://github.com/autovance/ftp-srv/pull/224, https://github.com/autovance/ftp-srv/issues/225, https://github.com/autovance/ftp-srv/security/advisories/GHSA-pmw4-jgxx-pcq9

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -78de22f518a76bd06b9a564f5b6eaf13047d4e95

    Affected versions

    v2.19.5
    v2.19.4
    v2.19.3
    v2.19.2
    v2.19.1
    v2.19.0

    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-2020-26299 | CVE-DB