BaseFortify

Publication date: 2025-10-13

Last updated on: 2025-10-20

Assigner: GitHub, Inc.

Description

Mastodon is a free, open-source social network server based on ActivityPub. In versions before 4.4.6, 4.3.14, and 4.2.27, disabling or suspending a user account does not disconnect the account from the streaming API. This allows disabled or suspended accounts to continue receiving real-time updates through existing streaming connections and to establish new streaming connections, even though they cannot interact with other API endpoints. This undermines moderation actions, as administrators expect disabled or suspended accounts to be fully disconnected from the service. This issue has been patched in versions 4.4.6, 4.3.14, and 4.2.27. No known workarounds exist.

CVSS Scores

EPSS Scores

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Meta Information

Published

2025-10-13

Last Modified

2025-10-20

Generated

2026-07-06

AI Q&A

2025-10-14

EPSS Evaluated

2026-07-05

NVD

CVE-2025-62175

Affected Vendors & Products

Vendor	Product	Version / Range
joinmastodon	mastodon	to 4.2.27 (exc)
joinmastodon	mastodon	From 4.3.0 (inc) to 4.3.14 (exc)
joinmastodon	mastodon	From 4.4.0 (inc) to 4.4.6 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-273	The product attempts to drop privileges but does not check or incorrectly checks to see if the drop succeeded.
CWE-274	The product does not handle or incorrectly handles when it has insufficient privileges to perform an operation, leading to resultant weaknesses.

Attack-Flow Graph

Executive Summary

This vulnerability in Mastodon versions before 4.4.6, 4.3.14, and 4.2.27 allows disabled or suspended user accounts to remain connected to the streaming API. Even though these accounts cannot interact with other API endpoints, they can still receive real-time updates and establish new streaming connections. This behavior undermines moderation efforts because administrators expect disabled or suspended accounts to be fully disconnected from the service.

Impact Analysis

The vulnerability can impact you by allowing disabled or suspended user accounts to continue receiving real-time updates and maintain streaming connections despite being restricted from other interactions. This undermines moderation controls and could allow unwanted or problematic users to bypass intended restrictions, potentially affecting the integrity and management of the social network.

Mitigation Strategies

Upgrade Mastodon to version 4.4.6, 4.3.14, or 4.2.27 or later, as these versions contain the patch that fixes the issue. No known workarounds exist.

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