CWE
20
Advisory Published
Updated

CVE-2020-12803: XForms submissions could overwrite local files

First published: Mon Jun 08 2020(Updated: )

ODF documents can contain forms to be filled out by the user. Similar to HTML forms, the contained form data can be submitted to a URI, for example, to an external web server. To create submittable forms, ODF implements the XForms W3C standard, which allows data to be submitted without the need for macros or other active scripting Prior to version 6.4.4 LibreOffice allowed forms to be submitted to any URI, including file: URIs, enabling form submissions to overwrite local files. User-interaction is required to submit the form, but to avoid the possibility of malicious documents engineered to maximize the possibility of inadvertent user submission this feature has now been limited to http[s] URIs, removing the possibility to overwrite local files. This issue affects: The Document Foundation LibreOffice versions prior to 6.4.4.

Credit: security@documentfoundation.org security@documentfoundation.org

Affected SoftwareAffected VersionHow to fix
Libreoffice Libreoffice<6.4.4
openSUSE Leap=15.1
Fedoraproject Fedora=31

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Frequently Asked Questions

  • What is CVE-2020-12803?

    CVE-2020-12803 is a vulnerability that allows ODF documents with forms to be filled out by the user to submit form data to an external web server.

  • How does CVE-2020-12803 affect LibreOffice?

    CVE-2020-12803 affects LibreOffice versions up to exclusive 6.4.4.

  • Which operating systems are affected by CVE-2020-12803?

    CVE-2020-12803 affects openSUSE Leap 15.1 and Fedora 31.

  • What is the severity of CVE-2020-12803?

    CVE-2020-12803 has a severity rating of medium (6.5).

  • How can CVE-2020-12803 be mitigated?

    To mitigate CVE-2020-12803, it is recommended to upgrade to a version of LibreOffice that is not affected.

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