4.3

CVE-2025-3446: mattermost Incorrect Authorization

CVSS: 4.3v3.1MediumAnalyzed
AliasesGHSA-r7r2-m3vr-c8qcGO-2025-3693
Published 15-05-2025Last modified 15-05-2025
Open JSON

Vulnerability summary

CVE-2025-3446 is a medium (CVSS 4.3) Incorrect Authorization vulnerability in mattermost. EPSS estimates a 0.26% chance of exploitation in the next 30 days, higher than 16.1% of scored vulnerabilities.

Overall risk
17/100
0100
Low · default modelHow is this calculated?
CVSS score
4.3/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.26%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2025:15159-1

Timeline

  1. 15-05-2025
    PublishedVulnerability first disclosed.
  2. 15-05-2025
    Last modifiedVulnerability information updated.

Description

Mattermost versions 10.6.x <= 10.6.1, 10.5.x <= 10.5.2, 10.4.x <= 10.4.4, 9.11.x <= 9.11.11 fail to check the correct permissions which allows authenticated users who only have permission to invite non-guest users to a team to add guest users to that team via the API to add a single user to a team.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.26%

Chance of exploitation in the next 30 days

Percentile

16%

Versus all other CVEs

30-day change

+0.01 pp

From 0.24% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.26%

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≥ 10.6.0, ≤ 10.6.1 | ≥ 10.5.0, ≤ 10.5.2 | ≥ 10.4.0, ≤ 10.4.4 | ≥ 9.11.0, ≤ 9.11.11
  • mattermost_server≥ 9.11.0, < 9.11.12 | ≥ 10.4.0, < 10.4.5 | ≥ 10.5.0, < 10.5.3 | ≥ 10.6.0, < 10.6.2
Github.com/mattermost1 product
  • mattermost-server≥ 10.6.0+incompatible, < 10.6.2+incompatible
Github.com/mattermost/mattermost/server1 product
  • v8≥ 10.6.0, < 10.6.2 | ≥ 10.5.0, < 10.5.3 | ≥ 10.4.0, < 10.4.5 | ≥ 9.11.0, < 9.11.12 | < 8.0.0-20250415054241-76ab3867b785

4 vendors · 6 products

References

4 links