3.8
CVE-2026-8823
- EPSS 0.23%
- Veröffentlicht 22.06.2026 13:41:28
- Zuletzt bearbeitet 26.06.2026 16:39:58
- Quelle responsibledisclosure@mattermo
- CVE-Watchlists
- Unerledigt
User Manager can demote bot accounts to guest without bot-management permission
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
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Mattermost ≫ Mattermost Server Version >= 10.11.0 < 10.11.18
Mattermost ≫ Mattermost Server Version >= 11.7.0 < 11.7.1
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. 
Login
Login| Typ | Quelle | Score | Percentile |
|---|---|---|---|
| EPSS | FIRST.org | 0.23% | 0.138 |
| Quelle | Base Score | Exploit Score | Impact Score | Vector String |
|---|---|---|---|---|
| responsibledisclosure@mattermost.com | 3.8 | 1.2 | 2.5 |
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L
|
CWE-863 Incorrect Authorization
The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
https://mattermost.com/security-updates