CVE-2026-8823
| Summary |
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
|
| Publication Date |
June 23, 2026, 1:16 a.m. |
| Registration Date |
June 27, 2026, 4:10 a.m. |
| Last Update |
June 27, 2026, 1:39 a.m. |
|
CVSS3.1 : LOW
|
| スコア |
3.8
|
| Vector |
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L |
| 攻撃元区分(AV) |
ネットワーク |
| 攻撃条件の複雑さ(AC) |
低 |
| 攻撃に必要な特権レベル(PR) |
高 |
| 利用者の関与(UI) |
不要 |
| 影響の想定範囲(S) |
変更なし |
| 機密性への影響(C) |
なし |
| 完全性への影響(I) |
低 |
| 可用性への影響(A) |
低 |
Affected software configurations
| Configuration1 |
or higher |
or less |
more than |
less than |
| cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* |
10.11.0 |
|
|
10.11.18 |
| cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* |
11.7.0 |
|
|
11.7.1 |
Related information, measures and tools
Common Vulnerabilities List