CVE-2023-42804

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    CVE-2023-42804

    Published: 30 Oct 2023Last Modified: 28 Oct 2026

    Summary: BigBlueButton Path Traversal – Reading Certain File Extensions

    Details: BigBlueButton is an open-source virtual classroom. BigBlueButton prior to version 2.6.0-beta.1 has a path traversal vulnerability that allows an attacker with a valid starting folder path, to traverse and read other files without authentication, assuming the files have certain extensions (txt, swf, svg, png). In version 2.6.0-beta.1, input validation was added on the parameters being passed and dangerous characters are stripped. There are no known workarounds.

    References: https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/42xxx/CVE-2023-42804.json, https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-3qjg-229m-vq84, https://nvd.nist.gov/vuln/detail/CVE-2023-42804, https://github.com/bigbluebutton/bigbluebutton/pull/15960

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -8002abc33b4c5f3dbdc71b5d66ad2af69466a8c5

    Affected versions

    v2.6.0-alpha.4
    v2.6.0-alpha.3
    v2.6.0-alpha.2
    v2.6.0-alpha.1

    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-2023-42804 | CVE-DB