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flask@2.1.1 vulnerabilities

A simple framework for building complex web applications.

  • latest version

    3.1.2

  • latest non vulnerable version

    3.1.2

  • first published

    15 years ago

  • latest version published

    2 months ago

  • licenses detected

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    Direct Vulnerabilities

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

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    VulnerabilityVulnerable Version
    • H
    Information Exposure

    Affected versions of this package are vulnerable to Information Exposure in the form of exposing the permanent session cookie, when all of the following conditions are met:

    1. The application is hosted behind a caching proxy that does not strip cookies or ignore responses with cookies.

    2. The application sets session.permanent = True.

    3. The application does not access or modify the session at any point during a request.

    4. SESSION_REFRESH_EACH_REQUEST is enabled (the default).

    5. The application does not set a Cache-Control header to indicate that a page is private or should not be cached.

    A response containing data intended for one client may be cached and sent to other clients. If the proxy also caches Set-Cookie headers, it may send one client's session cookie to other clients. Under these conditions, the Vary: Cookie header is not set when a session is refreshed (re-sent to update the expiration) without being accessed or modified.

    How to fix Information Exposure?

    Upgrade flask to version 2.2.5, 2.3.2 or higher.

    [,2.2.5)[2.3.0,2.3.2)
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