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    Debian LTS: DLA-2371-1: wordpress security update

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    Multiple vulnerabilities were discovered in Wordpress, a popular content management framework. CVE-2019-17670
    
    - -------------------------------------------------------------------------
    Debian LTS Advisory DLA-2371-1                This email address is being protected from spambots. You need JavaScript enabled to view it.
    https://www.debian.org/lts/security/                                     
    September 11, 2020                            https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------
    
    Package        : wordpress
    Version        : 4.7.18+dfsg-1+deb9u1
    CVE ID         : CVE-2019-17670 CVE-2020-4047 CVE-2020-4048 CVE-2020-4049 
                     CVE-2020-4050
    Debian Bug     : 942459 962685
    
    Multiple vulnerabilities were discovered in Wordpress, a popular
    content management framework.
    
    CVE-2019-17670
    
        WordPress has a Server Side Request Forgery (SSRF) vulnerability
        because Windows paths are mishandled during certain validation of
        relative URLs.
    
    CVE-2020-4047
    
        Authenticated users with upload permissions (like authors) are
        able to inject JavaScript into some media file attachment pages in
        a certain way. This can lead to script execution in the context of
        a higher privileged user when the file is viewed by them.
    
    CVE-2020-4048
    
        Due to an issue in wp_validate_redirect() and URL sanitization, an
        arbitrary external link can be crafted leading to unintended/open
        redirect when clicked.
    
    CVE-2020-4049
    
        When uploading themes, the name of the theme folder can be crafted
        in a way that could lead to JavaScript execution in /wp-admin on
        the themes page.
    
    CVE-2020-4050
    
        Misuse of the `set-screen-option` filter's return value allows
        arbitrary user meta fields to be saved. It does require an admin
        to install a plugin that would misuse the filter. Once installed,
        it can be leveraged by low privileged users.
    
    Additionally, this upload ensures latest comments can only be viewed
    from public posts, and fixes back the user activation procedure.
    
    For Debian 9 stretch, these problems have been fixed in version
    4.7.18+dfsg-1+deb9u1.
    
    We recommend that you upgrade your wordpress packages.
    
    For the detailed security status of wordpress please refer to
    its security tracker page at:
    https://security-tracker.debian.org/tracker/wordpress
    
    Further information about Debian LTS security advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://wiki.debian.org/LTS
    

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