CVE-2025-27157

—

CVSS 3.1

5.3 medium

EPSS

<1%p29

Published

Feb 27, 2025 (Feb 27, 2025)

Modified

Jun 17, 2026

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.

Vendors: joinmastodon
Products: mastodon
Weakness: CWE-770
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

NVD CVE.org GitHub PoCs EPSS (0.4%)

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