CVE-2024-41926

LOW

Mattermost 9.5.0-9.5.6 and 9.9.0 - Improper Access Control via RemoteId Spoofing

Title source: llm

Description

Mattermost versions 9.9.x <= 9.9.0 and 9.5.x <= 9.5.6 fail to validate the source of sync messages and only allow the correct remote IDs, which allows a malicious remote to set arbitrary RemoteId values for synced users and therefore claim that a user was synced from another remote.

References (1)

Core 1

Core References

Vendor Advisory

https://mattermost.com/security-updates

Scores

CVSS v3 2.7

EPSS 0.0018

EPSS Percentile 7.1%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-284 CWE-346

Status published

Products (4)

mattermost/mattermost 0 - 5.3.2-0.20240604093018-5114c3b7cdb8Go

mattermost/mattermost 9.5.0 - 9.5.7Go

mattermost/mattermost_server 9.9.0

mattermost/mattermost_server 9.5.0 - 9.5.7

Published Aug 01, 2024

Tracked Since Feb 18, 2026