PYSEC-2021-319

    Dashboard / Vulnerabilities / PYSEC-2021-319

    PYSEC-2021-319

    Published: 10 Sept 2021Last Modified: 10 Jun 2026

    Summary:

    Details: 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.

    References: 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, https://github.com/advisories/GHSA-v83x-78q3-gr2j

    Affected packages

    Package

    Name: postorius

    Purl: pkg:pypi/postorius

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -1.3.5

    Affected versions

    1.0.0
    1.0.0a1
    1.0.0a2
    1.0.0b1
    1.0.0b2
    1.0.0b3
    1.0.1
    1.0.2
    1.0.3

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    PYSEC-2021-319 | CVE-DB