CVE-2022-30999 Information

Description

FriendsofFlarum (FoF) Upload is an extension that handles file uploads intelligently for your forum. If FoF Upload prior to version 1.2.3 is configured to allow the uploading of SVG files (‘image/svg+xml’) navigating directly to an SVG file URI could execute arbitrary Javascript code decided by an attacker. This Javascript code could include the execution of HTTP web requests to Flarum or any other web service. This could allow data to be leaked by an authenticated Flarum user or possibly for data to be modified maliciously. This issue has been patched with v1.2.3 which now sanitizes uploaded SVG files. As a workaround remove the ability for users to upload SVG files through FoF Upload.

Reference

https://github.com/FriendsOfFlarum/upload/releases/tag/1.2.3 https://github.com/FriendsOfFlarum/upload/pull/318 https://github.com/FriendsOfFlarum/upload/issues/68 https://github.com/FriendsOfFlarum/upload/security/advisories/GHSA-fm53-mpmp-7qw2