CVE-2026-0999
5.4
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Summary
Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to properly validate login method restrictions which allows an authenticated user to bypass SSO-only login requirements via userID-based authentication. Mattermost Advisory ID: MMSA-2025-00548
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Mattermost | Mattermost | 11.1.0 <= 11.1.2 | affected |
| Mattermost | Mattermost | 10.11.0 <= 10.11.9 | affected |
| Mattermost | Mattermost | 11.2.0 <= 11.2.1 | affected |
| Mattermost | Mattermost | 11.3.0 | unaffected |
| Mattermost | Mattermost | 11.1.3 | unaffected |
| Mattermost | Mattermost | 10.11.10 | unaffected |
| Mattermost | Mattermost | 11.2.2 | unaffected |
Weaknesses
- CWE-303: CWE-303: Incorrect Implementation of Authentication Algorithm
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: partial
References
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