*Missing* {{invite_user}} *permission check on team creation allows unprivileged users to set open-invite and allowed-domains team settings*
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 10.11.17+incompatible, 11.5.5+incompatible, 11.6.1+incompatible, 8.0.0-20260501144115-7d6816abdfd1, 11.6.1, and 2 more
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15, 10.11.x <= 10.11.16 Fail to enforce PermissionInviteUser when setting AllowOpenInvite or AllowedDomains during team creation (the check was only applied on update/patch), which allows an authenticated user holding PermissionCreateTeam but not PermissionInviteUser on the resulting team to configure invite-controlled team settings (make the team publicly joinable via open invite and/or constrain membership via allowed domains) that they are not permitted to set on an existing team via POST /api/v4/teams with allow_open_invite: true and/or a non-empty allowed_domains in the request body.. Mattermost Advisory ID: MMSA-2026-00655
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Mattermost Mattermost
From 11.6.0 · through 11.6.1; From 11.5.0 · through 11.5.4; From 10.11.0 · through 10.11.15; From 10.11.0 · through 10.11.16
- github.com/mattermost/mattermost-serverGo
From 10.11.0+incompatible · fixed in 10.11.17+incompatible; From 11.5.0+incompatible · fixed in 11.5.5+incompatible; From 11.6.0+incompatible · fixed in 11.6.1+incompatible
- github.com/mattermost/mattermost-server/v5Go
All versions
- github.com/mattermost/mattermost-server/v6Go
All versions
- github.com/mattermost/mattermost/server/v8Go
From 8.0.0-20250731163400-5b955468ea1e · fixed in 8.0.0-20260501144115-7d6816abdfd1
- github.com/mattermost/mattermost-serverGo
From 11.6.0 · fixed in 11.6.1
- github.com/mattermost/mattermost-serverGo
From 11.5.0 · fixed in 11.5.5
- github.com/mattermost/mattermost-serverGo
From 10.11.0 · fixed in 10.11.17