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CVE-2021-42097

Published: 21 October 2021

GNU Mailman before 2.1.35 may allow remote Privilege Escalation. A csrf_token value is not specific to a single user account. An attacker can obtain a value within the context of an unprivileged user account, and then use that value in a CSRF attack against an admin (e.g., for account takeover).

Priority

High

Cvss 3 Severity Score

8.0

Score breakdown

Status

Package Release Status
mailman
Launchpad, Ubuntu, Debian
bionic
Released (1:2.1.26-1ubuntu0.4)
focal
Released (1:2.1.29-1ubuntu3.1)
upstream
Released (2.1.35)
xenial
Released (1:2.1.20-1ubuntu0.6+esm1)
Patches:
upstream: https://bazaar.launchpad.net/~mailman-coders/mailman/2.1/revision/1873

Severity score breakdown

Parameter Value
Base score 8.0
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H