BaseFortify

Publication date: 2025-10-16

Last updated on: 2025-10-21

Assigner: Mattermost, Inc.

Description

Mattermost versions 10.10.x <= 10.10.2, 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to validate email ownership during Slack import process which allows attackers to create verified user accounts with arbitrary email domains via malicious Slack import data to bypass email-based team access restrictions

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2025-10-16

Last Modified

2025-10-21

Generated

2026-07-06

AI Q&A

2025-10-16

EPSS Evaluated

2026-07-05

NVD

CVE-2025-41410

EUVD

EUVD-2025-34742

Affected Vendors & Products

Vendor	Product	Version / Range
mattermost	mattermost_server	From 10.5.0 (inc) to 10.5.11 (exc)
mattermost	mattermost_server	From 10.10.0 (inc) to 10.10.3 (exc)
mattermost	mattermost_server	From 10.11.0 (inc) to 10.11.3 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-862	The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

Executive Summary

This vulnerability exists in Mattermost versions 10.10.x <= 10.10.2, 10.5.x <= 10.5.10, and 10.11.x <= 10.11.2. It occurs because the software fails to validate email ownership during the Slack import process. This flaw allows attackers to create verified user accounts with arbitrary email domains by using malicious Slack import data, thereby bypassing email-based team access restrictions.

Impact Analysis

An attacker exploiting this vulnerability can create verified user accounts with arbitrary email addresses, potentially gaining unauthorized access to teams or resources that rely on email-based access restrictions. This could lead to unauthorized information disclosure or manipulation within the Mattermost environment.

Hi! I’m here to help you understand CVE-2025-41410. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70