CVE-2025-27157
Medium
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.
SeverityMedium
CVSS5.3
Exploit probability31. percentile0.4%
Product
Mastodon
PublishedFeb 27, 2025
First seenFeb 27, 2025
Weakness typeCWE-770Allocation of resources without limits
How to fix
Update
- joinmastodon mastodon4.2.16, 4.3.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| joinmastodon mastodon | 4.2.0 ≤ v < 4.2.16, 4.3.0 ≤ v < 4.3.4 | 4.2.16, 4.3.4 |
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