CVE-2021-40347

medium

Published 2022-05-24 · Modified 2024-04-22

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CVSS v3

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

CVSS v4 NEW

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not yet in upstream

VIR risk

5.5

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.

Predictions

Exploit likelihood

30%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

OS	Version	Status	Fixed in
arch		fixed	`1.3.5-1`
debian	bookworm	fixed	`1.3.5-1`
debian	bullseye	fixed	`1.3.4-2+deb11u1`
debian	forky	fixed	`1.3.5-1`
debian	sid	fixed	`1.3.5-1`
debian	trixie	fixed	`1.3.5-1`

Package impact

Ecosystem	Package	Vulnerable	Fixed
PyPI	postorius	`<1.3.5`	`1.3.5`

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.