TeamPass before 3.1.3.1 does not properly prevent a user from acting with the privileges of a different user_id.
https://github.com/nilsteampassnet/TeamPass/compare/3.1.3...3.1.3.1
https://github.com/nilsteampassnet/TeamPass/compare/3.1.2...3.1.3.1
https://github.com/nilsteampassnet/TeamPass/commit/c7f7f809071eaa9e04505ee79cec7049a42959e9