CVE-2025-25279-Mattermost-Path-Traversal

🔥 CVE-2025-25279 — Mattermost 10.4.1 📤 Path Traversal in Focalboard allowing file exfiltration 🌟 Presentation This proof of concept demonstrates the exploitation of vulnerability CVE-2025-25279 affecting Mattermost 10.4.1. A flaw in Focalboard the board management module allows arbitrary file...

CVE-2025-25279

Security Advisory MMSA-2025-00430 / CVE-2025-25279 Summary After uploading a file to Mattermost Boards, when the fileId parameter is modified and the board is copied, the file now points to and downloads the target file specified in the parameter. Affected Versions: Mattermost instances with Boar...

EUVD-2026-112505

Mattermost versions 11.9.x = 11.9.1, 11.8.x = 11.8.5, 11.7.x = 11.7.10 fail to validate the target post ID in the Agents plugin's mention reminder component, which allows an authenticated user who can post in a channel visible to a system administrator to cause the administrator's browser to send...

CVE-2026-93851

Mattermost versions 11.9.x = 11.9.1, 11.8.x = 11.8.5, 11.7.x = 11.7.10 fail to validate the target post ID in the Agents plugin's mention reminder component, which allows an authenticated user who can post in a channel visible to a system administrator to cause the administrator's browser to send...

CVE-2026-93851 Path traversal in Mattermost Agents plugin mention reminder allows plugin replacement via crafted post

Mattermost versions 11.9.x = 11.9.1, 11.8.x = 11.8.5, 11.7.x = 11.7.10 fail to validate the target post ID in the Agents plugin's mention reminder component, which allows an authenticated user who can post in a channel visible to a system administrator to cause the administrator's browser to send...

CVE-2026-93851

Mattermost versions 11.9.x <= 11.9.1 , 11.8.x <= 11.8.5 , and 11.7.x

CVE-2026-93851: Mattermost: Mattermost versions 11.9.x <= 11.9.1, 11.8.x <= 11.8.5, 11.7.x <= 11.7.10 fail to validate the target post ID in the…

Mattermost versions 11.9.x = 11.9.1, 11.8.x = 11.8.5, 11.7.x = 11.7.10 fail to validate the target post ID in the Agents plugin's mention reminder component, which allows an authenticated user who can post in a channel visible to a system administrator to cause the administrator's browser to send...

dr_robot

. . . . . . . : \ : \ : \ : . \ : / : . \ \ :| | | || || || : | || | \ | : | | | :| | . | || : \ | : \ | : || | | : | | | |. / | || |\ . / |/ . / | | :/ || || :/ :/ || : : : Copyright 2019 National Technology & Engineering Solutions of Sandia, LLC NTESS. Under the terms of Contract...

CVE-2026-93846

Mattermost versions 11.7.x = 11.7.10 fail to restrict which built-in roles can be assigned to a team member via the API, which allows a team admin to grant a team member permissions beyond those permitted by the configured permission scheme via the update-team-member-roles REST API.. Mattermost...

CVE-2026-93846

Mattermost versions 11.7.x = 11.7.10 fail to restrict which built-in roles can be assigned to a team member via the API, which allows a team admin to grant a team member permissions beyond those permitted by the configured permission scheme via the update-team-member-roles REST API.. Mattermost...

EUVD-2026-109968

Mattermost versions 11.7.x = 11.7.10 fail to restrict which built-in roles can be assigned to a team member via the API, which allows a team admin to grant a team member permissions beyond those permitted by the configured permission scheme via the update-team-member-roles REST API.. Mattermost...

CVE-2026-93846

Mattermost versions 11.7.x

CVE-2026-93846 Team admin can escalate a team member's permissions via the team member roles endpoint

Mattermost versions 11.7.x = 11.7.10 fail to restrict which built-in roles can be assigned to a team member via the API, which allows a team admin to grant a team member permissions beyond those permitted by the configured permission scheme via the update-team-member-roles REST API.. Mattermost...

CVE-2026-93847

Mattermost versions 11.7.x = 11.7.10 fail to validate reserved system post types on the scheduled post creation and publication paths which allows an authenticated channel member to publish messages rendering as trusted system events via the scheduled post endpoint.. Mattermost Advisory ID:...

CVE-2026-93848

Mattermost versions 11.7.x = 11.7.10 fail to apply outbound internal-connection filtering to the OpenID discovery endpoint request which allows a System Administrator to determine whether internal addresses and ports are reachable from the server via an unauthenticated login request that triggers...

CVE-2026-93849

Mattermost versions 11.9.x = 11.9.1, 11.8.x = 11.8.5, 11.7.x = 11.7.10, 11.10.x = 11.10.1 Mattermost fail to apply allocation limits to the byte-string decode paths in its WebSocket msgpack decoder, which allows an authenticated remote attacker to cause excessive server memory allocation via a...

CVE-2026-93850

Mattermost versions 11.9.x = 11.9.1, 11.8.x = 11.8.5, 11.7.x = 11.7.10, 11.10.x = 11.10.1 fail to bind the volume of text extracted from an uploaded PDF which allows an authenticated user to exhaust server memory and cause a denial of service via a crafted PDF whose compressed content stream...

CVE-2026-93848 Mattermost OpenID discovery endpoint request bypasses outbound connection filtering, allowing SSRF by a System Administrator

Mattermost versions 11.7.x = 11.7.10 fail to apply outbound internal-connection filtering to the OpenID discovery endpoint request which allows a System Administrator to determine whether internal addresses and ports are reachable from the server via an unauthenticated login request that triggers...

CVE-2026-93848 Mattermost OpenID discovery endpoint request bypasses outbound connection filtering, allowing SSRF by a System Administrator

Mattermost versions 11.7.x = 11.7.10 fail to apply outbound internal-connection filtering to the OpenID discovery endpoint request which allows a System Administrator to determine whether internal addresses and ports are reachable from the server via an unauthenticated login request that triggers...

EUVD-2026-109939

Mattermost versions 11.7.x = 11.7.10 fail to apply outbound internal-connection filtering to the OpenID discovery endpoint request which allows a System Administrator to determine whether internal addresses and ports are reachable from the server via an unauthenticated login request that triggers...