GO-2025-4201 Mattermost Server is vulnerable to webhook and slash command manipulation in github.com/mattermost/mattermost-server

Mattermost Server is vulnerable to webhook and slash command manipulation in github.com/mattermost/mattermost-server...

GO-2025-4200 Mattermost Server allows attackers to gain privileges by accessing unintended API endpoints with users' credentials in github.com/mattermost/mattermost-server

Mattermost Server allows attackers to gain privileges by accessing unintended API endpoints with users' credentials in github.com/mattermost/mattermost-server...

GO-2025-4204 Mattermost Server does not properly restrict use of slash commands in github.com/mattermost/mattermost-server

Mattermost Server does not properly restrict use of slash commands in github.com/mattermost/mattermost-server...

GO-2025-4202 Mattermost Server allows attackers to create buttons that can launch API requests in github.com/mattermost/mattermost-server

Mattermost Server allows attackers to create buttons that can launch API requests in github.com/mattermost/mattermost-server...

SUSE CVE-2018-21258

An issue was discovered in Mattermost Server before 5.1. It allows attackers to cause a denial of service via the invitepeople slash command...

Mattermost Server 10.5.x <= 10.5.12 / 10.11.x <= 10.11.4 / 10.12.x <= 10.12.1 / 11.0.x <= 11.0.3 Improper Authentication (MMSA-2025-00547)

The version of Mattermost Server installed on the remote host is affected by a vulnerability as referenced in the MMSA-2025-00547 advisory. - Mattermost versions 10.12.x = 10.12.1, 10.11.x = 10.11.4, 10.5.x = 10.5.12, 11.0.x = 11.0.3 fail to properly validate OAuth state tokens during OpenID...

Mattermost Server 10.5.x <= 10.5.12 / 10.11.x <= 10.11.4 / 10.12.x <= 10.12.1 / 11.0.x <= 11.0.2 Multiple Vulnerabilities (CVE-2025-12421, MMSA-2025-00526, CVE-2025-12756)

The version of Mattermost Server installed on the remote host is affected by a vulnerability as referenced in CVE-2025-12421, MMSA-2025-00526 and CVE-2025-12756. - Mattermost versions 11.0.x = 11.0.2, 10.12.x = 10.12.1, 10.11.x = 10.11.4, 10.5.x = 10.5.12 fail to to verify that the token used...

Mattermost Server 10.5.x <= 10.5.12 / 10.11.x <= 10.11.4 Improper Access Control (MMSA-2025-00517)

The version of Mattermost Server installed on the remote host is affected by a vulnerability as referenced in the MMSA-2025-00517 advisory. - Mattermost versions 10.11.x = 10.11.4, 10.5.x = 10.5.12 fail to validate the user permission when accessing the files and subscribing to the block in Board...

GO-2025-4186 Mattermost Server does not prevent System Admin from arbitrary file creation in github.com/mattermost/mattermost-server

Mattermost Server does not prevent System Admin from arbitrary file creation in github.com/mattermost/mattermost-server. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is causing false-positive...

GO-2025-4183 CVE-2017-18870 in github.com/mattermost/mattermost-server

CVE-2017-18870 in github.com/mattermost/mattermost-server...

GO-2025-4198 Mattermost Server has low entropy for authorization data as an OAuth 2.0 Service Provider in github.com/mattermost/mattermost-server

Mattermost Server has low entropy for authorization data as an OAuth 2.0 Service Provider in github.com/mattermost/mattermost-server...

GO-2025-4184 Mattermost Server vulnerable to Denial of Service through `@` character prefix inserted into JavaScript field names in github.com/mattermost/mattermost-server

Mattermost Server vulnerable to Denial of Service through @ character prefix inserted into JavaScript field names in github.com/mattermost/mattermost-server...

GO-2025-4185 Mattermost Server exposes team invite IDs through API endpoints in github.com/mattermost/mattermost-server

Mattermost Server exposes team invite IDs through API endpoints in github.com/mattermost/mattermost-server...

GO-2025-4189 Mattermost Server is vulnerable to XSS through author_link field in Slack attachments in github.com/mattermost/mattermost-server

Mattermost Server is vulnerable to XSS through authorlink field in Slack attachments in github.com/mattermost/mattermost-server...

GO-2025-4187 Mattermost Server is vulnerable to Path Traversal when files are stored locally in github.com/mattermost/mattermost-server

Mattermost Server is vulnerable to Path Traversal when files are stored locally in github.com/mattermost/mattermost-server. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. If this is causing false-positi...

GO-2025-4190 Mattermost Server is vulnerable to XSS attacks against an OAuth 2.0 allow/deny page in github.com/mattermost/mattermost-server

Mattermost Server is vulnerable to XSS attacks against an OAuth 2.0 allow/deny page in github.com/mattermost/mattermost-server...

GO-2025-4197 Mattermost Server exposes OAuth personal access tokens to attackers in github.com/mattermost/mattermost-server

Mattermost Server exposes OAuth personal access tokens to attackers in github.com/mattermost/mattermost-server...

Timing-Based Side-Channel Attack

github.com/mattermost/mattermost-server is vulnerable to timing-based side-channel attacks. The vulnerability is due to improper use of constant-time comparison for sensitive strings, which allows an attacker to exploit timing oracles to perform byte-by-byte brute-force attacks on Cloud API keys...

Improper Access Control

github.com/mattermost/mattermost-server is vulnerable to improper access control. The vulnerability is due to Mattermost failing to verify whether a user has permission to join a team when using the original invite token, which allows an attacker to manipulate the OAuth state and join any team on...

Improper Access Control

github.com/mattermost/mattermost-server is vulnerable to improper access control. The vulnerability is due to insufficient validation of guest user permissions when accessing channel information, which allows an attacker to discover active public channels and their metadata via the...