8.1

CVE-2025-58075: mattermost Missing Authorization

CVSS: 8.1v3.1HighAnalyzed
AliasesGHSA-r6qj-894f-5hr2GO-2025-4035
Published 16-10-2025Last modified 26-02-2026
Open JSON

Vulnerability summary

CVE-2025-58075 is a high (CVSS 8.1) Missing Authorization vulnerability in mattermost. EPSS estimates a 0.34% chance of exploitation in the next 30 days, higher than 25.7% of scored vulnerabilities.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.34%
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. 26-02-2026
    Last modifiedVulnerability information updated.

Description

Mattermost versions 10.11.x <= 10.11.1, 10.10.x <= 10.10.2, 10.5.x <= 10.5.10 fail to verify a user has permission to join a Mattermost team using the original invite token which allows any attacked to join any team on a Mattermost server regardless of restrictions via manipulating the RelayState

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.34%

Chance of exploitation in the next 30 days

Percentile

26%

Versus all other CVEs

30-day change

0.00 pp

From 0.34% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.34%

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≥ 10.11.0, ≤ 10.11.1 | ≥ 10.10.0, ≤ 10.10.2 | ≥ 10.5.0, ≤ 10.5.10
  • 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≥ 10.11.0, < 10.11.2 | ≥ 10.10.0, < 10.10.3 | ≥ 10.5.0, < 10.5.11 | ≥ 10.11.0+incompatible, < 10.11.2+incompatible
Github.com/mattermost/mattermost/server1 product
  • v8< 8.0.0-20250815100400-2d5cdc6e217e | All versions (No fix recorded)

4 vendors · 6 products

References

7 links