Mattermost OpenID discovery endpoint request bypasses outbound connection filtering, allowing SSRF by a System Administrator
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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No data.
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| Mattermost | Mattermost |
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Vendor Solution
Update Mattermost to versions 11.11.0, 11.7.11 or higher.
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.289% probability within 30 days)
| Link | Providers |
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| https://mattermost.com/security-updates |
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| First Time appeared |
Mattermost mattermost Server
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| CPEs | cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Mattermost mattermost Server
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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 <= 11.7.10 fail to apply outbound internal-connection filtering to the OpenID discovery endpoint request which allows a System Administrator to determine whether internal addresses and ports are reachable from the server via an unauthenticated login request that triggers the discovery fetch.. Mattermost Advisory ID: MMSA-2026-00774 | |
| Title | Mattermost OpenID discovery endpoint request bypasses outbound connection filtering, allowing SSRF by a System Administrator | |
| Weaknesses | CWE-918 | |
| References |
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| Metrics |
cvssV3_1
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