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Vendor Solution
Update Mattermost to versions 11.8.0, 11.7.1, 10.11.18 or higher.
Tracking
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No advisories yet.
| Link | Providers |
|---|---|
| https://mattermost.com/security-updates |
|
Mon, 22 Jun 2026 20:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Mattermost
Mattermost mattermost |
|
| Vendors & Products |
Mattermost
Mattermost mattermost |
Mon, 22 Jun 2026 17:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Mon, 22 Jun 2026 15:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Mattermost versions 11.7.x <= 11.7.0, 10.11.x <= 10.11.17 fail to validate bot targets when demoting users to guests which allows a lower-privileged administrator to degrade arbitrary bot accounts via the standard demote-user API.. Mattermost Advisory ID: MMSA-2026-00669 | |
| Title | User Manager can demote bot accounts to guest without bot-management permission | |
| Weaknesses | CWE-863 | |
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: Mattermost
Published:
Updated: 2026-06-22T16:12:31.350Z
Reserved: 2026-05-18T10:05:31.691Z
Link: CVE-2026-8823
Updated: 2026-06-22T16:12:26.753Z
No data.
No data.
OpenCVE Enrichment
Updated: 2026-06-22T20:00:06Z