3.5

CVE-2025-55074: mattermost

CVSS: 3.5v3.1LowAnalyzed
AliasesGHSA-9hh7-6558-qfp2GO-2025-4133
Published 18-11-2025Last modified 18-11-2025
Open JSON

Vulnerability summary

CVE-2025-55074 is a low (CVSS 3.5) vulnerability in mattermost. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 5.8% of scored vulnerabilities.

Overall risk
14/100
0100
Low · default modelHow is this calculated?
CVSS score
3.5/10
010
Low · v3.1 (NVD)
EPSS score
0.17%
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-2025:4395-1

Timeline

  1. 18-11-2025
    PublishedVulnerability first disclosed.
  2. 18-11-2025
    Last modifiedVulnerability information updated.

Description

Mattermost versions 10.11.x <= 10.11.3, 10.5.x <= 10.5.11 fail to enforce access permissions on the Agents plugin which allows other users to determine when users had read channels via channel member objects

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

6%

Versus all other CVEs

30-day change

0.00 pp

From 0.17% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.17%

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
Github.com/mattermost1 product
  • mattermost-server≥ 10.11.0, < 10.11.4 | ≥ 10.5.0, < 10.5.12 | ≥ 10.11.0+incompatible, < 10.11.4+incompatible
Github.com/mattermost/mattermost/server1 product
  • v8< 8.0.0-20250905150616-ba86dfc5876b6 | All versions (No fix recorded)

4 vendors · 6 products

References

9 links