CVE-2021-40347
Publication date 10 September 2021
Last updated 25 August 2025
Ubuntu priority
Description
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.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| postorius | ||
| 22.04 LTS jammy |
Fixed 1.3.5-1
|
|
| 20.04 LTS focal |
Fixed 1.2.4-1ubuntu0.1
|
|
| 18.04 LTS bionic |
Fixed 1.1.2-3ubuntu0.1
|
|
| 16.04 LTS xenial | Ignored end of standard support | |
| 14.04 LTS trusty | Not in release |
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
5.4 · Medium
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | Low |
| Integrity impact | Low |
| Availability impact | None |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N |