CVE-2025-3228: Github.com/mattermost/mattermost server Mattermost Allows An Unauthorized Guest Vulnerability
MODERATECVE-2025-3228 is a MODERATE (CVSS 4.3) mattermost allows an unauthorized guest vulnerability (CWE-863: Incorrect Authorization) affecting Github.com/mattermost/mattermost server libraries in the Go ecosystem. The issue involves mattermost allows an unauthorized guest user access to playbook. Remediation is available by upgrading affected packages to version 0.0.0-20250520060012-d0380305ef7a, 8.0.0-20250520060012-d0380305ef7a, 10.5.6, 9.11.16, 10.8.1, 10.7.3, 10.6.6.
CVE-2025-3228 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:L/I:N/A:N).
How to Fix CVE-2025-3228
To remediate this vulnerability, upgrade all affected Github.com/mattermost/mattermost server 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 to 0.0.0-20250520060012-d0380305ef7aUpgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20250520060012-d0380305ef7aUpgrade github.com/mattermost/mattermost/server/v8 to 10.5.6Upgrade github.com/mattermost/mattermost/server/v8 to 9.11.16Upgrade github.com/mattermost/mattermost/server/v8 to 10.8.1Upgrade github.com/mattermost/mattermost/server/v8 to 10.7.3Upgrade github.com/mattermost/mattermost/server/v8 to 10.6.6Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for github.com/mattermost/mattermost-serverHow to Check if You Are Affected
To determine whether your application is affected by CVE-2025-3228, inspect your project dependencies for Github.com/mattermost/mattermost server:
inspect dependencies for github.com/mattermost/mattermost-serverAnalyze the terminal output to locate any version of Github.com/mattermost/mattermost server in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.0.0-20250520060012-d0380305ef7a), 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, 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-2025-3228 Affected Github.com/mattermost/mattermost server Versions
7 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
github.com/mattermost/mattermost-server
|
Go |
< 0.0.0-20250520060012-d0380305ef7a
|
0.0.0-20250520060012-d0380305ef7a
|
|
github.com/mattermost/mattermost/server/v8
|
Go |
< 8.0.0-20250520060012-d0380305ef7a
|
8.0.0-20250520060012-d0380305ef7a
|
|
github.com/mattermost/mattermost/server/v8
|
Go |
≥ 10.5.0
< 10.5.6
|
10.5.6
|
|
github.com/mattermost/mattermost/server/v8
|
Go |
≥ 9.11.0
< 9.11.16
|
9.11.16
|
|
github.com/mattermost/mattermost/server/v8
|
Go |
≥ 10.8.0
< 10.8.1
All 1 versions
10.8.0
|
10.8.1
|
|
github.com/mattermost/mattermost/server/v8
|
Go |
≥ 10.7.0
< 10.7.3
|
10.7.3
|
|
github.com/mattermost/mattermost/server/v8
|
Go |
≥ 10.6.0
< 10.6.6
|
10.6.6
|
References
Frequently Asked Questions
What is CVE-2025-3228?
Which Github.com/mattermost/mattermost server versions are affected?
What version fixes CVE-2025-3228?
Is github.com/mattermost/mattermost-server affected?
Is github.com/mattermost/mattermost/server/v8 affected?
What is the CVSS score of CVE-2025-3228?
What CWE is associated with CVE-2025-3228?
How can I check Go dependencies for CVE-2025-3228?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-4578-6gjh-f2jm",
"modified" : "2025-06-20T18:08:28Z",
"published" : "2025-06-20T15:30:38Z",
"aliases" : [ "CVE-2025-3228" ],
"summary" : "Mattermost allows an unauthorized Guest user access to Playbook",
"details" : "Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, 10.6.x <= 10.6.5 fail to properly retrieve requestorInfo from playbooks handler for guest users which allows an attacker access to the playbook run.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost-server"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "0.0.0-20250520060012-d0380305ef7a"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost/server/v8"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "8.0.0-20250520060012-d0380305ef7a"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost/server/v8"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "10.5.0"
}, {
"fixed" : "10.5.6"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 10.5.5"
}
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost/server/v8"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "9.11.0"
}, {
"fixed" : "9.11.16"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 9.11.15"
}
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost/server/v8"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "10.8.0"
}, {
"fixed" : "10.8.1"
} ]
} ],
"versions" : [ "10.8.0" ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost/server/v8"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "10.7.0"
}, {
"fixed" : "10.7.3"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 10.7.2"
}
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost/server/v8"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "10.6.0"
}, {
"fixed" : "10.6.6"
} ]
} ],
"database_specific" : {
"last_known_affected_version_range" : "<= 10.6.5"
}
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-3228"
}, {
"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" : "2025-06-20T18:08:27Z",
"nvd_published_at" : "2025-06-20T15:15:20Z"
}
}