CVE-2023-48732

Keywords that trigger mentions are leaked to other users

State: Published
Severity: 4.3 Medium
Published: Jan 2, 2024
Updated: Jun 3, 2025
Reserved: Dec 21, 2023

Description

Mattermost fails to scope the WebSocket response around notified users to a each user separately resulting in the WebSocket broadcasting the information about who was notified about a post to everyone else in the channel.

Scores

CVSS	Score	Vector	Source
3.1	4.3 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N	Mattermost

Weaknesses

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

Affected Products

Product	Versions
MattermostMattermost	8.1.6 and earlierAffected 8.1.7Not affected

References

https://mattermost.com/security-updates

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