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osvGoogleOSV:GHSA-5263-PM2H-M7HW
HistoryAug 22, 2024 - 9:30 a.m.

Mattermost doesn't restrict which roles can promote a user as system admin

2024-08-2209:30:32
Google
osv.dev
2
mattermost
security vulnerability
user promotion
system admin
software
version 9.9.x
version 9.5.x
version 9.10.x
version 9.8.x

CVSS3

7.2

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

AI Score

7.1

Confidence

Low

EPSS

0.001

Percentile

20.0%

Mattermost versions 9.9.x <= 9.9.1, 9.5.x <= 9.5.7, 9.10.x <= 9.10.0 and 9.8.x <= 9.8.2 fail to restrict which roles can promote a user as system admin which allows a System Role with edit access to the permissions section of system console to update their role (e.g. member) to include the manage_system permission, effectively becoming a System Admin.

CVSS3

7.2

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

AI Score

7.1

Confidence

Low

EPSS

0.001

Percentile

20.0%

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