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CVE-2021-40347

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Date: September 10, 2021

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.

Language: Python

Severity Score

Related Resources (11)

https://security-tracker.debian.org/tracker/CVE-2021-40347
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=993746
https://nvd.nist.gov/vuln/detail/CVE-2021-40347
https://www.debian.org/security/2021/dsa-4970
https://phabricator.wikimedia.org/T289798
https://gitlab.com/mailman/postorius
https://gitlab.com/mailman/postorius/-/commit/3d880c56b58bc26b32eac0799407d74b64b7474b
https://gitlab.com/mailman/postorius/-/issues/531
https://github.com/pypa/advisory-database/tree/main/vulns/postorius/PYSEC-2021-319.yaml
https://gitlab.com/mailman/postorius/-/tags
https://www.mend.io/vulnerability-database/CVE-2021-40347

Severity Score

Weakness Type (CWE)

Improper Access Control

CWE-284

Insufficient Information

NVD-CWE-noinfo

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): LOW
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): SINGLE
Confidentiality (C): PARTIAL
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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