GHSA-rv3x-xq3r-8j9h

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    GHSA-rv3x-xq3r-8j9h

    Published: 9 Jun 2023Last Modified: 8 Jul 2026

    Summary: LeafKit allows XSS with untrusted user input

    Details: ### Impact This affects anyone passing unsanitised data to Leaf's variable tags. Before this fix, Leaf would not escape any strings passed to tags as variables. If an attacker managed to find a variable that was rendered with their unsanitised data, they could inject scripts into a generated Leaf page, which could enable XSS attacks if other mitigations such as a Content Security Policy were not enabled. ### Patches This has been patched in 1.3.0 ### Workarounds Sanitise any untrusted input before passing it to Leaf and enable a CSP to block inline script and CSS data. ### References https://github.com/vapor/leaf-kit-ghsa-rv3x-xq3r-8j9h/pull/1 ### For more information If you have any questions or comments about this advisory: * Open an issue in [Leaf Kit](https://github.com/vapor/leaf-kit) * Email us at [[email protected]](mailto:[email protected])

    References: https://github.com/vapor/leaf-kit/security/advisories/GHSA-rv3x-xq3r-8j9h, https://nvd.nist.gov/vuln/detail/CVE-2021-37634, https://github.com/vapor/leaf-kit, https://github.com/vapor/leaf-kit/releases/tag/1.3.0

    Affected packages

    Package

    Name: github.com/vapor/leaf-kit

    Purl: pkg:swift/github.com/vapor/leaf-kit

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -1.3.0

    Affected versions

    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
    GHSA-rv3x-xq3r-8j9h | CVE-DB