User Manager can demote bot accounts to guest without bot-management permission
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
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| Mattermost | Mattermost | unaffected |
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Configuration 1 [-]
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No data.
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| Mattermost | Mattermost |
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Vendor Solution
Update Mattermost to versions 11.8.0, 11.7.1, 10.11.18 or higher.
| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-xmfh-3ccg-c9fx | Mattermost has an Incorrect Authorization issue |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.318% probability within 30 days)
| Link | Providers |
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| https://mattermost.com/security-updates |
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| Type | Values Removed | Values Added |
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| First Time appeared |
Mattermost
Mattermost mattermost |
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| Vendors & Products |
Mattermost
Mattermost mattermost |
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| Metrics |
ssvc
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| 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 |
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| Metrics |
cvssV3_1
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