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osvGoogleOSV:GHSA-JQ3G-XQPX-37X3
HistoryAug 01, 2024 - 3:32 p.m.

Mattermost failed to properly validate synced reactions

2024-08-0115:32:21
Google
osv.dev
3
mattermost
synced reactions
validation
vulnerability
version 9.9.x
version 9.5.x
shared channels
malicious remote

CVSS3

4.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

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

AI Score

7

Confidence

High

EPSS

0

Percentile

14.7%

Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6 fail to properly validate synced reactions, when shared channels are enabled, which allows a malicious remote to create arbitrary reactions on arbitrary posts

CVSS3

4.3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

LOW

Availability Impact

NONE

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

AI Score

7

Confidence

High

EPSS

0

Percentile

14.7%