CVE-2025-9081: Github.com/mattermost/mattermost plugin boards Mattermost Boards Plugin Fails To Vulnerability
LOWCVE-2025-9081 is a LOW (CVSS 3.1) mattermost boards plugin fails to vulnerability (CWE-639: Authorization Bypass Through User-Controlled Key) affecting Github.com/mattermost/mattermost plugin boards libraries in the Go ecosystem. The issue involves mattermost boards plugin fails to restrict download access to files. Remediation is available by upgrading affected packages to version 0.0.0-20250716054606-3f3e3becfe1d, 8.0.0-20250721095935-11c36f4d1e44, 10.5.9, 9.11.18.
CVE-2025-9081 at a Glance
Security Impact
CVSS: 3.1
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N).
How to Fix CVE-2025-9081
To remediate this vulnerability, upgrade all affected Github.com/mattermost/mattermost plugin boards 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-plugin-boards to 0.0.0-20250716054606-3f3e3becfe1dUpgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20250721095935-11c36f4d1e44Upgrade github.com/mattermost/mattermost-server to 10.5.9Upgrade github.com/mattermost/mattermost-server to 9.11.18Run the following command in your project directory to verify that all resolved dependencies use the patched release:
inspect dependencies for github.com/mattermost/mattermost-plugin-boardsHow to Check if You Are Affected
To determine whether your application is affected by CVE-2025-9081, inspect your project dependencies for Github.com/mattermost/mattermost plugin boards:
inspect dependencies for github.com/mattermost/mattermost-plugin-boardsAnalyze the terminal output to locate any version of Github.com/mattermost/mattermost plugin boards in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 0.0.0-20250716054606-3f3e3becfe1d), 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-639: Authorization Bypass Through User-Controlled Key, where the system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. In Github.com/mattermost/mattermost plugin boards, 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-2025-9081 Affected Github.com/mattermost/mattermost plugin boards Versions
4 component(s)| Product / Package | Ecosystem | Affected Versions | Fixed Version |
|---|---|---|---|
|
github.com/mattermost/mattermost-plugin-boards
|
Go |
< 0.0.0-20250716054606-3f3e3becfe1d
|
0.0.0-20250716054606-3f3e3becfe1d
|
|
github.com/mattermost/mattermost/server/v8
|
Go |
< 8.0.0-20250721095935-11c36f4d1e44
|
8.0.0-20250721095935-11c36f4d1e44
|
|
github.com/mattermost/mattermost-server
|
Go |
≥ 10.5.0-rc1
< 10.5.9
|
10.5.9
|
|
github.com/mattermost/mattermost-server
|
Go |
≥ 9.11.0-rc1
< 9.11.18
|
9.11.18
|
References
Frequently Asked Questions
What is CVE-2025-9081?
Which Github.com/mattermost/mattermost plugin boards versions are affected?
What version fixes CVE-2025-9081?
Is github.com/mattermost/mattermost-plugin-boards affected?
Is github.com/mattermost/mattermost/server/v8 affected?
What is the CVSS score of CVE-2025-9081?
What CWE is associated with CVE-2025-9081?
How can I check Go dependencies for CVE-2025-9081?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-f72g-52v7-mg3p",
"modified" : "2025-09-26T16:23:18Z",
"published" : "2025-09-19T21:31:21Z",
"aliases" : [ "CVE-2025-9081" ],
"summary" : "Mattermost boards plugin fails to restrict download access to files",
"details" : "Mattermost versions 10.5.x <= 10.5.8, 9.11.x <= 9.11.17 fail to properly validate access controls which allows any authenticated user to download sensitive files via board file download endpoint using UUID enumeration",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N"
} ],
"affected" : [ {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost-plugin-boards"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "0.0.0-20250716054606-3f3e3becfe1d"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost/server/v8"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "8.0.0-20250721095935-11c36f4d1e44"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost-server"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "10.5.0-rc1"
}, {
"fixed" : "10.5.9"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost-server"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "9.11.0-rc1"
}, {
"fixed" : "9.11.18"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-9081"
}, {
"type" : "WEB",
"url" : "https://github.com/mattermost/mattermost-plugin-boards/pull/114"
}, {
"type" : "WEB",
"url" : "https://github.com/mattermost/mattermost-plugin-boards/commit/3f3e3becfe1d66db0d0f4fd235f04afd6e1ec40b"
}, {
"type" : "PACKAGE",
"url" : "https://github.com/mattermost/mattermost-plugin-boards"
}, {
"type" : "WEB",
"url" : "https://mattermost.com/security-updates"
}, {
"type" : "WEB",
"url" : "https://pkg.go.dev/vuln/GO-2025-3978"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-639" ],
"severity" : "LOW",
"github_reviewed" : true,
"github_reviewed_at" : "2025-09-22T18:00:01Z",
"nvd_published_at" : "2025-09-19T20:15:40Z"
}
}