5.4

CVE-2025-41410: mattermost Missing Authorization

CVSS: 5.4v3.1MediumAnalyzed
AliasesGHSA-3q4q-wqm6-hvf3GO-2025-4029
Published 16-10-2025Last modified 16-10-2025
Open JSON

Vulnerability summary

CVE-2025-41410 is a medium (CVSS 5.4) Missing Authorization vulnerability in mattermost. EPSS estimates a 0.30% chance of exploitation in the next 30 days, higher than 21.8% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.4/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.30%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 2
OPENSUSE-SU-2025:15710-1OPENSUSE-SU-2026:21483-1

Timeline

  1. 16-10-2025
    PublishedVulnerability first disclosed.
  2. 16-10-2025
    Last modifiedVulnerability information updated.

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 metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.30%

Chance of exploitation in the next 30 days

Percentile

22%

Versus all other CVEs

30-day change

0.00 pp

From 0.30% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.30%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Github.com/mattermost/mattermost-server2 products
  • v5All versions (No fix recorded)
  • v6All versions (No fix recorded)
Mattermost2 products
  • mattermost≥ 10.10.0, ≤ 10.10.2 | ≥ 10.5.0, ≤ 10.5.10 | ≥ 10.11.0, ≤ 10.11.2
  • mattermost_server≥ 10.5.0, < 10.5.11 | ≥ 10.10.0, < 10.10.3 | ≥ 10.11.0, < 10.11.3
Github.com/mattermost1 product
  • mattermost-server≥ 10.10.0, < 10.10.3 | ≥ 10.5.0, < 10.5.11 | ≥ 10.11.0, < 10.11.3 | ≥ 10.11.0+incompatible, < 10.11.3+incompatible
Github.com/mattermost/mattermost/server1 product
  • v8< 8.0.0-20250822083415-01b95392a450 | All versions (No fix recorded)

4 vendors · 6 products

References

7 links