Mastodon 4.1.x < 4.1.15 Unrestricted File Upload

According to its self-reported version number, the version of Mastodon running on the remote host is prior to 3.5.19 or 4.0.x prior to 4.0.15 or 4.1.x prior to 4.1.15 or 4.2.x prior to 4.2.7. Therefore, it may be affected by a lack of media type verification of Activity Streams objects allows...