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.
References (2)
Core 2
Core References
Vendor Advisory x_refsource_confirm
https://github.com/mastodon/mastodon/security/advisories/GHSA-v39f-c9jj-8w7h
Scores
CVSS v3
5.3
EPSS
0.0024
EPSS Percentile
47.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-770
Status
published
Products (1)
joinmastodon/mastodon
4.2.0 - 4.2.16
Published
Feb 27, 2025
Tracked Since
Feb 18, 2026