The thoughtbot paperclip gem before 4.2.2 for Ruby does not consider the content-type value during media-type validation, which allows remote attackers to upload HTML documents and conduct cross-site scripting (XSS) attacks via a spoofed value, as demonstrated by image/jpeg.
{ "nvd_published_at": null, "severity": "MODERATE", "github_reviewed_at": "2020-06-16T21:19:37Z", "github_reviewed": true, "cwe_ids": [ "CWE-79" ] }