CVE-2021-40347: GNU Mailman Postorius Access Control Issues
(updated )
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
- bugs.debian.org/cgi-bin/bugreport.cgi?bug=993746
- github.com/advisories/GHSA-v83x-78q3-gr2j
- github.com/pypa/advisory-database/tree/main/vulns/postorius/PYSEC-2021-319.yaml
- gitlab.com/mailman/postorius
- gitlab.com/mailman/postorius/-/commit/3d880c56b58bc26b32eac0799407d74b64b7474b
- gitlab.com/mailman/postorius/-/issues/531
- gitlab.com/mailman/postorius/-/tags
- nvd.nist.gov/vuln/detail/CVE-2021-40347
- phabricator.wikimedia.org/T289798
- www.debian.org/security/2021/dsa-4970
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