An issue was discovered in views/list.py in GNU Mailman Postorius before 1.3.5. An attacker (logged into any account) can send a crafted POST request to unsubscribe any user from a mailing list, also revealing whether that address was subscribed in the first place.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Postorius | Postorius_project | * | 1.3.5 (excluding) |
| Postorius | Ubuntu | bionic | * |
| Postorius | Ubuntu | devel | * |
| Postorius | Ubuntu | focal | * |
| Postorius | Ubuntu | hirsute | * |
| Postorius | Ubuntu | impish | * |
| Postorius | Ubuntu | jammy | * |
| Postorius | Ubuntu | kinetic | * |
| Postorius | Ubuntu | trusty | * |
| Postorius | Ubuntu | xenial | * |