CVE-2020-8264

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    CVE-2020-8264

    Published: 6 Jan 2021Last Modified: 9 Sept 2026

    Summary:

    Details: In actionpack gem >= 6.0.0, a possible XSS vulnerability exists when an application is running in development mode allowing an attacker to send or embed (in another page) a specially crafted URL which can allow the attacker to execute JavaScript in the context of the local application. This vulnerability is in the Actionable Exceptions middleware.

    References: https://groups.google.com/g/rubyonrails-security/c/yQzUVfv42jk/m/oJWw-xhNAQAJ, https://hackerone.com/reports/904059

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 66cabeda2c46c582d19738e1318be8d59584cc5b
    Fixed -fe76a95b0d252a2d7c25e69498b720c96b243ea2

    Affected versions

    v6.0.3.3
    v6.0.3.2
    v6.0.3.1
    v6.0.3
    v6.0.3.rc1
    v6.0.0

    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-2020-8264 | CVE-DB