GHSA-qx76-c53f-5c7q

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    GHSA-qx76-c53f-5c7q

    Published: 14 May 2022Last Modified: 16 Feb 2024

    Summary: PHP League CommonMark vulnerable to Cross-Site Scripting (XSS)

    Details: Cross-site scripting (XSS) vulnerability in the PHP League CommonMark library versions 0.15.6 through 0.18.x before 0.18.1 allows remote attackers to insert unsafe URLs into HTML (even if allow_unsafe_links is false) via a newline character (e.g., writing javascript as javascri%0apt).

    References: https://nvd.nist.gov/vuln/detail/CVE-2018-20583, https://github.com/thephpleague/commonmark/issues/337, https://commonmark.thephpleague.com/changelog, https://github.com/FriendsOfPHP/security-advisories/blob/master/league/commonmark/CVE-2018-20583.yaml, https://github.com/thephpleague/commonmark, https://github.com/thephpleague/commonmark/releases/tag/0.18.1

    Affected packages

    Package

    Name: league/commonmark

    Purl: pkg:composer/league/commonmark

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0.15.6
    Fixed -0.18.1

    Affected versions

    0.15.6
    0.15.7

    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