CVE-2025-27157

MEDIUM EPSS 25.6%
Published Feb 27, 20251y ago · Modified Jun 17, 20261w ago
5.3 CVSS 3.1
Medium
Find Similar
Published Feb 27, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
5.3
Exploitability
3.9
Impact
1.4
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability Low

Threat Intelligence

EPSS Exploit Probability
25.6% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-770

Affected Products 2

VendorProductVersionRange
joinmastodonmastodon*≥4.2.0  –  <4.2.16
joinmastodonmastodon*≥4.3.0  –  <4.3.4

References 2

  • github.com https://github.com/mastodon/mastodon/commit/06f879ce9bea195344ac9f71e6799eea500628ec
    Patch
  • github.com https://github.com/mastodon/mastodon/security/advisories/GHSA-v39f-c9jj-8w7h
    Vendor Advisory

Remediation

  • github.com https://github.com/mastodon/mastodon/commit/06f879ce9bea195344ac9f71e6799eea500628ec
    Patch