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Fencer Vulns
low 3.1

CVE-2025-3611 json

Improper Access Control in Mattermost allows System Managers to view team details despite role restrictions

published 2025-05-30 17 mo ago modified 2026-08-07 3 mo ago also GHSA-86jg-35xj-3vv5 , GO-2025-3728 , EUVD-2025-16492

cvss
3.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 14%
public exploits
0
none known

Summary

Mattermost versions 10.7.x <= 10.7.0, 10.5.x <= 10.5.3, 9.11.x <= 9.11.12 fails to properly enforce access control restrictions for System Manager roles, allowing authenticated users with System Manager privileges to view team details they should not have access to via direct API requests to team endpoints, even when explicitly configured with 'No access' to Teams in the System Console.

Patch / fix

  • go github.com/mattermost/mattermost/server/v8 8.0.0-20250414154356-6f33b721de76, 9.11.13, 10.5.4, 10.7.1
  • go github.com/mattermost/mattermost-server 9.11.13+incompatible, 10.5.4+incompatible, 10.7.1+incompatible
  • Mattermost Mattermost 9.11.13, 10.5.4, 10.7.1, 10.8.0
  • govulncheck-vulndb openSUSE Tumbleweed 0.0.20250612T141001-1.1

opensuse advisories openSUSE-SU-2025:15225-1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
17 mo ago

Exploit prediction

0.23% chance of exploitation in the next 30 days, higher than 14% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 3.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
NVD 3.1 4.3 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
GitHub 3.1 3.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

Affected packages

ecosystem package affected fixed in
go github.com/mattermost/mattermost/server/v8
>=10.6.0-rc1, <10.7.1
>=10.0.0-rc1, <10.5.4
>=9.0.0-rc1, <9.11.13
<8.0.0-20250414154356-6f33b721de76
10.7.1
10.5.4
9.11.13
8.0.0-20250414154356-6f33b721de76
go github.com/mattermost/mattermost-server
>=9.0.0-rc1+incompatible, <9.11.13+incompatible
>=10.0.0-rc1+incompatible, <10.5.4+incompatible
>=10.6.0-rc1+incompatible, <10.7.1+incompatible
9.11.13+incompatible
10.5.4+incompatible
10.7.1+incompatible
go github.com/mattermost/mattermost-server/v5
all versions
 no fix listed
go github.com/mattermost/mattermost-server/v6
all versions
 no fix listed

Affected products

  • Mattermost Mattermost

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.