Description
Mattermost versions 11.2.x <= 11.2.2, 10.11.x <= 10.11.10, 11.4.x <= 11.4.0, 11.3.x <= 11.3.1 fail to restrict team-level access when processing membership sync from a remote cluster, which allows a malicious remote cluster to grant a user access to an entire private team instead of only the shared channel via sending crafted membership sync messages that trigger team membership assignment. Mattermost Advisory ID: MMSA-2026-00574
CVSS 5.4EPSS 0.14100000000000001%Risque 0.55
Voir la source- Publication
- 2026-03-26 11:16:21
- Versions concernées
- <=11.2.2,<=10.11.10,<=11.4.0,<=11.3.1
- Type
- Installed app
- Vecteur
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N