| Package | Affected versions | Patched versions |
|---|---|---|
| matrix-sydent | < 1.0.2 | 1.0.2 |
| sydent | < 1.0.2 | 1.0.2 |
util/emailutils.py in Matrix Sydent before 1.0.2 mishandles registration restrictions that are based on e-mail domain, if the allowed_local_3pids option is enabled. This occurs because of potentially unwanted behavior in Python, in which an email.utils.parseaddr call on [email protected]@good.example.com returns the [email protected] substring.
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