EUVD-2026-25282

Mastodon is a free, open-source social network server based on ActivityPub. Prior to v4.5.9, v4.4.16, and v4.3.22, Mastodon allows restricting new user sign-up based on e-mail domain names, and performs basic validation on e-mail addresses, but fails to restrict characters that are interpreted...

PT-2019-12248

Name of the Vulnerable Software and Affected Versions Matrix Sydent versions prior to 1.0.2 Description The issue arises from the handling of registration restrictions based on e-mail domain in util/emailutils.py. Specifically, when the allowed local 3pids option is enabled, it can lead to...