CVE-2021-39175

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    CVE-2021-39175

    Published: 30 Aug 2021Last Modified: 7 Aug 2026

    Summary:

    Details: HedgeDoc is a platform to write and share markdown. In versions prior to 1.9.0, an unauthenticated attacker can inject arbitrary JavaScript into the speaker-notes of the slide-mode feature by embedding an iframe hosting the malicious code into the slides or by embedding the HedgeDoc instance into another page. The problem is patched in version 1.9.0. There are no known workarounds aside from upgrading.

    References: https://github.com/hedgedoc/hedgedoc/pull/1369, https://github.com/hedgedoc/hedgedoc/pull/1375, https://github.com/hedgedoc/hedgedoc/pull/1513, https://github.com/hedgedoc/hedgedoc/security/advisories/GHSA-j748-779h-9697

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -98b0bf25d2859f335f90a805120726a5c54b1917

    Affected versions

    1.9.0-rc1

    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-2021-39175 | CVE-DB