Mattermost Server < 8.1.9 / 9.2.x < 9.2.5 / 9.3.x < 9.3.1 / 9.4.x < 9.4.2, 9.5.0 Multiple Vulnerabilities (MMSA-2023-00285)

medium Nessus Plugin ID 191689


The remote host is missing one or more security updates.


The version of Mattermost Server installed on the remote host is prior to 8.1.9, 9.2.5, 9.3.1, or 9.4.2, 9.5.0. It is, therefore, affected by multiple vulnerabilities as referenced in the MMSA-2023-00285 advisory.

- Mattermost fails to check if compliance export is enabled when fetching posts of public channels allowing a user that is not a member of the public channel to fetch the posts, which will not be audited in the compliance export. (CVE-2024-1887)

- Mattermost fails to properly restrict the access of files attached to posts in an archived channel, resulting in members being able to access files of archived channels even if the Allow users to view archived channels option is disabled. (CVE-2024-23488)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.


Upgrade to Mattermost Server version 8.1.9 / 9.2.5 / 9.3.1 / 9.4.2, 9.5.0 or later.

See Also

Plugin Details

Severity: Medium

ID: 191689

File Name: mattermost_server_MMSA-2023-00285.nasl

Version: 1.2

Type: remote

Family: CGI abuses

Published: 3/7/2024

Updated: 4/11/2024

Supported Sensors: Nessus

Risk Information


Risk Factor: Low

Score: 1.4


Risk Factor: Medium

Base Score: 4

Temporal Score: 3

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:P/A:N

CVSS Score Source: CVE-2024-1887


Risk Factor: Medium

Base Score: 4.3

Temporal Score: 3.8

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:mattermost:mattermost_server

Required KB Items: installed_sw/Mattermost Server

Exploit Ease: No known exploits are available

Patch Publication Date: 1/30/2024

Vulnerability Publication Date: 2/29/2024

Reference Information

CVE: CVE-2024-1887, CVE-2024-23488

IAVA: 2024-A-0127-S