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osvGoogleOSV:GHSA-85JJ-C9JR-9JHX
HistoryNov 27, 2023 - 12:30 p.m.

Mattermost Improper Access Control vulnerability

2023-11-2712:30:55
Google
osv.dev
7
mattermost
improper access control
api vulnerability
focalboard
guest user

4.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

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

4.5 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

14.0%

Mattermost fails to perform proper authorization in the /plugins/focalboard/api/v2/users endpoint allowing an attacker who is a guest user and knows the ID of another userΒ to get their information (e.g. name, surname, nickname) via Mattermost Boards.

4.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

LOW

Integrity Impact

NONE

Availability Impact

NONE

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

4.5 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

14.0%