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justhtml@1.9.0 vulnerabilities

A pure Python HTML5 parser that just works.

  • latest version

    1.13.0

  • latest non vulnerable version

    1.13.0

  • first published

    3 months ago

  • latest version published

    6 days ago

  • licenses detected

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    Direct Vulnerabilities

    Known vulnerabilities in the justhtml package. This does not include vulnerabilities belonging to this package’s dependencies.

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    VulnerabilityVulnerable Version
    • H
    Cross-site Scripting (XSS)

    justhtml is an A pure Python HTML5 parser that just works.

    Affected versions of this package are vulnerable to Cross-site Scripting (XSS) via the to_markdown function when serializing attacker-controlled <pre> content. An attacker can execute arbitrary HTML or scripts by crafting input containing backticks and HTML-like text within a sanitized <pre> element, causing the generated Markdown to break out of the intended code block and render raw HTML when processed by Markdown renderers that allow raw HTML.

    How to fix Cross-site Scripting (XSS)?

    Upgrade justhtml to version 1.13.0 or higher.

    [,1.13.0)
    • L
    Cross-site Scripting (XSS)

    justhtml is an A pure Python HTML5 parser that just works.

    Affected versions of this package are vulnerable to Cross-site Scripting (XSS) in the serialization process of raw-text elements such as script and style when a custom sanitization policy retains these elements. An attacker can execute arbitrary scripts in the context of the affected application by injecting specially crafted text nodes that break out of the raw-text context and introduce malicious HTML or JavaScript.

    Note: This is only exploitable if a custom policy is used that allows script or style elements to be retained during sanitization.

    How to fix Cross-site Scripting (XSS)?

    Upgrade justhtml to version 1.12.0 or higher.

    [,1.12.0)
    • M
    Cross-site Scripting (XSS)

    justhtml is an A pure Python HTML5 parser that just works.

    Affected versions of this package are vulnerable to Cross-site Scripting (XSS) in the to_markdown function. An attacker can inject arbitrary HTML content by supplying specially crafted input that includes HTML-significant characters such as < and >, which are not properly escaped during Markdown serialization. This can lead to the execution of unintended scripts or markup when the generated Markdown is rendered.

    How to fix Cross-site Scripting (XSS)?

    Upgrade justhtml to version 1.12.0 or higher.

    [,1.12.0)
    • H
    Uncontrolled Recursion

    justhtml is an A pure Python HTML5 parser that just works.

    Affected versions of this package are vulnerable to Uncontrolled Recursion in the construction, when parsing deeply nested HTML structures. An attacker can cause the application to terminate unexpectedly or fail requests by supplying HTML input with excessive nesting, which triggers unbounded recursion and results in an unhandled RecursionError.

    How to fix Uncontrolled Recursion?

    Upgrade justhtml to version 1.10.0 or higher.

    [,1.10.0)
    Go back to all versions of this package