3.7

CVE-2025-13324: mattermost Incorrect Authorization

CVSS: 3.7v3.1LowAnalyzed
AliasesGHSA-x3r8-2hmh-89f5GO-2025-4256
Published 17-12-2025Last modified 24-12-2025
Open JSON

Vulnerability summary

CVE-2025-13324 is a low (CVSS 3.7) Incorrect Authorization vulnerability in mattermost. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.2% of scored vulnerabilities.

Overall risk
15/100
0100
Low · default modelHow is this calculated?
CVSS score
3.7/10
010
Low · v3.1 (CVE.org)
EPSS score
0.20%
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-2026:21483-1SUSE-SU-2026:0037-1

Timeline

  1. 17-12-2025
    PublishedVulnerability first disclosed.
  2. 24-12-2025
    Last modifiedVulnerability information updated.

Description

Mattermost versions 10.11.x <= 10.11.5, 11.0.x <= 11.0.4, 10.12.x <= 10.12.2 fail to invalidate remote cluster invite tokens when using the legacy (version 1) protocol or when the confirming party does not provide a refreshed token, which allows an attacker who has obtained an invite token to authenticate as the remote cluster and perform limited actions on shared channels even after the invitation has been legitimately confirmed.

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

0.00 pp

From 0.20% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.20%

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/mattermost2 products
  • mattermost≥ 10.12.0, < 10.12.2 | ≥ 10.11.0-rc1, < 10.11.5 | ≥ 11.0.0-alpha.1, < 11.0.4 | ≥ 11.0.0-alpha.1+incompatible, < 11.0.4+incompatible
  • mattermost-server< 11.0.4 | < 11.0.4+incompatible
Github.com/mattermost/mattermost-server2 products
  • v5All versions (No fix recorded)
  • v6All versions (No fix recorded)
Mattermost2 products
  • mattermost≥ 10.11.0, ≤ 10.11.5 | ≥ 11.0.0, ≤ 11.0.4 | ≥ 10.12.0, ≤ 10.12.2
  • mattermost_server≥ 10.11.0, < 10.11.6 | ≥ 10.12.0, < 10.12.3 | ≥ 11.0.0, < 11.0.5
Github.com/mattermost/mattermost/server1 product
  • v8< 8.0.0-20251031095924-e7e23b94e006

4 vendors · 7 products

References

7 links