GO-2026-4782 Mattermost Boards Plugin fails to implement authorisation checks on comment block modifications in github.com/mattermost/mattermost-plugin-boards

Mattermost Boards Plugin fails to implement authorisation checks on comment block modifications in github.com/mattermost/mattermost-plugin-boards...

Mattermost Boards Plugin fails to implement authorisation checks on comment block modifications

Mattermost Plugins versions =11.3 11.0.3 11.2.2 10.10.11.0 fail to implement authorisation checks on comment block modifications, which allows an authorised attacker with editor permission to modify comments created by other board members. Mattermost Advisory ID: MMSA-2025-00559...

CVE-2023-40703

Mattermost fails to properly limit the characters allowed in different fields of a block in Mattermost Boards allowing a attacker to consume excessive resources, possibly leading to Denial of Service, by patching the field of a block using a specially crafted string...

GHSA-58W6-W55X-6WQ8 Mattermost fails to validate user permissions in Boards

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 Boards, which allows an authenticated user to access other board files and was able to subscribe to the block from other boards that the user does...

CVE-2025-13870

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 Boards, which allows an authenticated user to access other board files and was able to subscribe to the block from other boards that the user does...

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 validate user permissions when deleting comments in Boards, which allows an authenticated user with the editor role to delete comments created by other users...

CVE-2025-12756 Insecure Direct Object Reference in Mattermost Boards Plugin Enables Unauthorised Comment Deletion

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 validate user permissions when deleting comments in Boards, which allows an authenticated user with the editor role to delete comments created by other users...

CVE-2025-12756 Insecure Direct Object Reference in Mattermost Boards Plugin Enables Unauthorised Comment Deletion

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 validate user permissions when deleting comments in Boards, which allows an authenticated user with the editor role to delete comments created by other users...

PT-2025-48544

Name of the Vulnerable Software and Affected Versions Mattermost versions 11.0.0 through 11.0.2 Mattermost versions 10.5.0 through 10.5.12 Mattermost versions 10.11.0 through 10.11.4 Mattermost versions 10.12.0 through 10.12.1 Description The software does not properly check user permissions when...

EUVD-2021-24345

Malware in sbrugna...

EUVD-2021-24344

Malware in sbrugna...

EUVD-2023-44235

Malicious code in bioql PyPI...

EUVD-2023-0891

Malicious code in bioql PyPI...

GO-2025-3978 Mattermost boards plugin fails to restrict download access to files in github.com/mattermost/mattermost-plugin-boards

Mattermost boards plugin fails to restrict download access to files in github.com/mattermost/mattermost-plugin-boards...

GHSA-F72G-52V7-MG3P Mattermost boards plugin fails to restrict download access to files

Mattermost versions 10.5.x = 10.5.8, 9.11.x = 9.11.17 fail to properly validate access controls which allows any authenticated user to download sensitive files via board file download endpoint using UUID enumeration...

Mattermost boards plugin fails to restrict download access to files

Mattermost versions 10.5.x = 10.5.8, 9.11.x = 9.11.17 fail to properly validate access controls which allows any authenticated user to download sensitive files via board file download endpoint using UUID enumeration...

CVE-2023-1776

Boards in Mattermost allows an attacker to upload a malicious SVG image file as an attachment to a card and share it using a direct link to the file...

CVE-2021-37866

Mattermost Boards plugin v0.10.0 and earlier fails to invalidate a session on the server-side when a user logged out of Boards, which allows an attacker to reuse old session token for authorization...

CVE-2021-37867

Mattermost Boards plugin v0.10.0 and earlier fails to protect email addresses of all users via one of the Boards APIs, which allows authenticated and unauthorized users to access this information resulting in sensitive & private information disclosure...

CVE-2025-20051 Arbitrary file read via block duplication in Mattermost Boards

Mattermost versions 10.4.x = 10.4.1, 9.11.x = 9.11.7, 10.3.x = 10.3.2, 10.2.x = 10.2.2 fail to properly validate input when patching and duplicating a board, which allows a user to read any arbitrary file on the system via duplicating a specially crafted block in Boards...