CVE-2021-27279

    Dashboard / Vulnerabilities / CVE-2021-27279

    CVE-2021-27279

    Published: 22 Feb 2021Last Modified: 8 Jul 2026

    Summary:

    Details: MyBB before 1.8.25 allows stored XSS via nested [email] tags with MyCode (aka BBCode).

    References: https://mybb.com/versions/1.8.25/, https://github.com/mybb/mybb/commit/cb781b49116bf5c4d8deca3e17498122b701677a, https://github.com/mybb/mybb/security/advisories/GHSA-6483-hcpp-p75w

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 0
    Fixed -cb781b49116bf5c4d8deca3e17498122b701677a

    Affected versions

    mybb_1824

    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-2021-27279 | CVE-DB