CVE-2021-21250

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    CVE-2021-21250

    Published: 15 Jan 2021Last Modified: 7 Aug 2026

    Summary:

    Details: OneDev is an all-in-one devops platform. In OneDev before version 4.0.3, there is a critical vulnerability which may lead to arbitrary file read. When BuildSpec is provided in XML format, the spec is processed by XmlBuildSpecMigrator.migrate(buildSpecString); which processes the XML document without preventing the expansion of external entities. These entities can be configured to read arbitrary files from the file system and dump their contents in the final XML document to be migrated. If the files are dumped in properties included in the YAML file, it will be possible for an attacker to read them. If not, it is possible for an attacker to exfiltrate the contents of these files Out Of Band. This issue was addressed in 4.0.3 by ignoring ENTITY instructions in xml file.

    References: https://github.com/theonedev/onedev/security/advisories/GHSA-9pph-8gfc-6w2r, https://github.com/theonedev/onedev/commit/9196fd795e87dab069b4260a3590a0ea886e770f

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -4bd71941974a1b077e955616d7ba3da6fd21670c

    Affected versions

    v4.0.2
    v4.0.1
    v4.0.0

    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-2021-21250 | CVE-DB