CVE-2026-4265

MEDIUM

4.3

Descricao

Mattermost versions 11.3.x <= 11.3.0, 11.2.x <= 11.2.2, 10.11.x <= 10.11.10 fail to validate team-specific upload_file permissions which allows a guest user to post files in channels where they lack upload_file permission via uploading files in a team where they have permission and reusing the file metadata in a POST request to a different team. Mattermost Advisory ID: MMSA-2025-00553

Detalhes CVE

Pontuacao CVSS v3.14.3

SeveridadeMEDIUM

Vetor CVSSCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Vetor de ataqueNETWORK

ComplexidadeLOW

Privilegios necessariosLOW

Interacao do usuarioNONE

Publicado3/16/2026

Ultima modificacao3/18/2026

Fontenvd

Avistamentos honeypot0

Produtos afetados

mattermost:mattermost_server

Fraquezas (CWE)

CWE-863

Referencias

https://mattermost.com/security-updates(responsibledisclosure@mattermost.com)

Correlacoes IOC

Sem correlacoes registradas

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