4.3

CVE-2025-13870: mattermost

CVSS: 4.3v3.1MediumAnalyzed
AliasesGHSA-58w6-w55x-6wq8GO-2025-4178
Published 02-12-2025Last modified 02-12-2025
Open JSON

Vulnerability summary

CVE-2025-13870 is a medium (CVSS 4.3) vulnerability in mattermost. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 11.9% of scored vulnerabilities.

Overall risk
17/100
0100
Low · default modelHow is this calculated?
CVSS score
4.3/10
010
Medium · v3.1 (NVD)
EPSS score
0.22%
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 3 · Related 3
OPENSUSE-SU-2026:21483-1SUSE-SU-2025:4395-1SUSE-SU-2026:0037-1

Timeline

  1. 02-12-2025
    PublishedVulnerability first disclosed.
  2. 02-12-2025
    Last modifiedVulnerability information updated.

Description

Mattermost versions 10.11.x <= 10.11.4, 10.5.x <= 10.5.12 fail to validate the user permission when accessing the files and subscribing to the block in Boards, which allows an authenticated user to access other board files and was able to subscribe to the block from other boards that the user does not have access to

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

12%

Versus all other CVEs

30-day change

0.00 pp

From 0.22% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.22%

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≥ 10.11.0, < 10.11.5 | ≥ 10.5.0, < 10.5.13 | ≥ 10.11.0+incompatible, < 10.11.5+incompatible
  • mattermost-serverAll versions (No fix recorded)
Github.com/mattermost/mattermost-server2 products
  • v5All versions (No fix recorded)
  • v6All versions (No fix recorded)
Mattermost2 products
Github.com/mattermost/mattermost/server1 product
  • v8< 8.0.0-20250905150616-ba86dfc5876b | < 8.0.0-20251212204551-54f2e9b4afd5

4 vendors · 7 products

References

5 links