CVE-2021-40347 Information

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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Reference

https://gitlab.com/mailman/postorius/-/commit/3d880c56b58bc26b32eac0799407d74b64b7474b https://gitlab.com/mailman/postorius/-/tags https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=993746 https://gitlab.com/mailman/postorius/-/issues/531 https://phabricator.wikimedia.org/T289798 https://www.debian.org/security/2021/dsa-4970

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

LOW

Base Score

NONE

Base Severity

5.4