CVE-2020-12803

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.