CVE-2025-27157

Mastodon's rate-limits are missing on `/auth/setup`

State: Published
Severity: 5.3 Medium
Published: Feb 27, 2025
Updated: Feb 27, 2025
Reserved: Feb 19, 2025

Description

Mastodon is a self-hosted, federated microblogging platform. Starting in version 4.2.0 and prior to versions 4.2.16 and 4.3.4, the rate limits are missing on `/auth/setup`. Without those rate limits, an attacker can craft requests that will send an email to an arbitrary addresses. Versions 4.2.16 and 4.3.4 fix the issue.

Scores

CVSS	Score	Vector	Source
3.1	5.3 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L	GitHub_M

Weaknesses

CWE-770 Allocation of Resources Without Limits or Throttling

Affected Products

Product	Versions
mastodonmastodon	>= 4.2.0, < 4.2.16Affected >= 4.3.0, < 4.3.4Affected

References

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