CVE-2025-3446: Github.com/mattermost/mattermost/server/v8 Mattermost Fails To Validate Team Vulnerability
MODERATECVE-2025-3446 is a MODERATE (CVSS 4.3) mattermost fails to validate team vulnerability (CWE-863: Incorrect Authorization) affecting Github.com/mattermost/mattermost/server/v8 libraries in the Go ecosystem. The issue involves mattermost fails to validate team invite permissions. Remediation is available by upgrading affected packages to version 10.6.2, 10.5.3, 10.4.5, 9.11.12, 8.0.0-20250415054241-76ab3867b785.
CVE-2025-3446 at a Glance
Security Impact
CVSS: 4.3
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N).
How to Fix CVE-2025-3446
To remediate this vulnerability, upgrade all affected Github.com/mattermost/mattermost/server/v8 dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Upgrade github.com/mattermost/mattermost/server/v8 to 10.6.2Upgrade github.com/mattermost/mattermost/server/v8 to 10.5.3Upgrade github.com/mattermost/mattermost/server/v8 to 10.4.5Upgrade github.com/mattermost/mattermost/server/v8 to 9.11.12Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20250415054241-76ab3867b785Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for github.com/mattermost/mattermost/server/v8How to Check if You Are Affected
To determine whether your application is affected by CVE-2025-3446, inspect your project dependencies for Github.com/mattermost/mattermost/server/v8:
inspect dependencies for github.com/mattermost/mattermost/server/v8Analyze the terminal output to locate any version of Github.com/mattermost/mattermost/server/v8 in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 10.6.2), your application is affected.
Note: Verify declared build manifests and deployed runtime container environments.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-863: Incorrect Authorization, where 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. In Github.com/mattermost/mattermost/server/v8, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
CVE-2025-3446 Affected Github.com/mattermost/mattermost/server/v8 Versions
5 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
github.com/mattermost/mattermost/server/v8
|
Go |
≥ 10.6.0
< 10.6.2
|
10.6.2
|
|
github.com/mattermost/mattermost/server/v8
|
Go |
≥ 10.5.0
< 10.5.3
|
10.5.3
|
|
github.com/mattermost/mattermost/server/v8
|
Go |
≥ 10.4.0
< 10.4.5
|
10.4.5
|
|
github.com/mattermost/mattermost/server/v8
|
Go |
≥ 9.11.0
< 9.11.12
|
9.11.12
|
|
github.com/mattermost/mattermost/server/v8
|
Go |
< 8.0.0-20250415054241-76ab3867b785
|
8.0.0-20250415054241-76ab3867b785
|
References
Frequently Asked Questions
What is CVE-2025-3446?
Which Github.com/mattermost/mattermost/server/v8 versions are affected?
What version fixes CVE-2025-3446?
Is github.com/mattermost/mattermost/server/v8 affected?
What is the CVSS score of CVE-2025-3446?
What CWE is associated with CVE-2025-3446?
How can I check Go dependencies for CVE-2025-3446?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-r7r2-m3vr-c8qc",
"modified" : "2025-05-17T14:02:03Z",
"published" : "2025-05-15T12:30:27Z",
"aliases" : [ "CVE-2025-3446" ],
"summary" : "Mattermost Fails to Validate Team Invite Permissions",
"details" : "Mattermost versions 10.6.x <= 10.6.1, 10.5.x <= 10.5.2, 10.4.x <= 10.4.4, 9.11.x <= 9.11.11 fail to check the correct permissions which allows authenticated users who only have permission to invite non-guest users to a team to add guest users to that team via the API to add a single user to a team.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost/server/v8"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "10.6.0"
}, {
"fixed" : "10.6.2"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 10.6.1"
}
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost/server/v8"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "10.5.0"
}, {
"fixed" : "10.5.3"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 10.5.2"
}
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost/server/v8"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "10.4.0"
}, {
"fixed" : "10.4.5"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 10.4.4"
}
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost/server/v8"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "9.11.0"
}, {
"fixed" : "9.11.12"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 9.11.11"
}
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost/server/v8"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "8.0.0-20250415054241-76ab3867b785"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-3446"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/mattermost/mattermost"
}, {
"type" : "WEB",
"url" : "https://mattermost.com/security-updates"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-863" ],
"severity" : "MODERATE",
"github_reviewed" : true,
"github_reviewed_at" : "2025-05-17T14:02:03Z",
"nvd_published_at" : "2025-05-15T11:15:48Z"
}
}