CVE-2020-26260

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    CVE-2020-26260

    Published: 9 Dec 2020Last Modified: 7 Aug 2026

    Summary:

    Details: BookStack is a platform for storing and organising information and documentation. In BookStack before version 0.30.5, a user with permissions to edit a page could set certain image URL's to manipulate functionality in the exporting system, which would allow them to make server side requests and/or have access to a wider scope of files within the BookStack file storage locations. The issue was addressed in BookStack v0.30.5. As a workaround, page edit permissions could be limited to only those that are trusted until you can upgrade.

    References: https://bookstackapp.com/blog/beta-release-v0-30-5/, https://github.com/BookStackApp/BookStack/releases/tag/v0.30.5, https://github.com/BookStackApp/BookStack/security/advisories/GHSA-8wfc-w2r5-x7cr

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -eecc08eddec4c7d58aeeae8ef806b2a852c803e3

    Affected versions

    v0.30.4
    v0.30.3
    v0.30.2
    v0.30.1
    v0.30.0

    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-2020-26260 | CVE-DB