Improper Access Control in Mattermost Channel Member API
- 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- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean?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 10.7.1, 10.5.4, 9.11.13, 8.0.0-20250414110750-c23f44fe8ed0, 9.11.13+incompatible, 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 10.7.x <= 10.7.0, 10.5.x <= 10.5.3, 9.11.x <= 9.11.12 fail to properly enforce access controls for guest users accessing channel member information, allowing authenticated guest users to view metadata about members of public channels via the channel members API endpoint.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Mattermost Mattermost
From 10.5.0 · through 10.5.3; From 9.11.0 · through 9.11.12
- github.com/mattermost/mattermost/server/v8Go
From 10.6.0-rc1 · fixed in 10.7.1
- github.com/mattermost/mattermost/server/v8Go
From 10.0.0-rc1 · fixed in 10.5.4
- github.com/mattermost/mattermost/server/v8Go
From 9.0.0-rc1 · fixed in 9.11.13
- github.com/mattermost/mattermost/server/v8Go
fixed in 8.0.0-20250414110750-c23f44fe8ed0
- github.com/mattermost/mattermost-serverGo
From 9.0.0-rc1+incompatible · fixed in 9.11.13+incompatible; From 10.0.0-rc1+incompatible · fixed in 10.5.4+incompatible; From 10.6.0-rc1+incompatible · fixed in 10.7.1+incompatible
- github.com/mattermost/mattermost-server/v5Go
All versions
- github.com/mattermost/mattermost-server/v6Go
All versions