CVE-2025-24526: Github.com/mattermost/mattermost/server/v8 Mattermost Fails To Restrict Channel Vulnerability
MODERATECVE-2025-24526 is a MODERATE (CVSS 4.3) mattermost fails to restrict channel vulnerability (CWE-863: Incorrect Authorization) affecting Github.com/mattermost/mattermost/server/v8 libraries in the Go ecosystem. The issue involves mattermost fails to restrict channel export of archived channels. Remediation is available by upgrading affected packages to version 8.0.0-20250110161910-96195f1bd746, 9.11.8, 10.2.3, 10.3.3, 10.4.2.
CVE-2025-24526 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-2025-24526
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 8.0.0-20250110161910-96195f1bd746Upgrade github.com/mattermost/mattermost/server/v8 to 9.11.8Upgrade github.com/mattermost/mattermost/server/v8 to 10.2.3Upgrade github.com/mattermost/mattermost/server/v8 to 10.3.3Upgrade github.com/mattermost/mattermost/server/v8 to 10.4.2Run 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-2025-24526, 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 8.0.0-20250110161910-96195f1bd746), 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-2025-24526 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 |
< 8.0.0-20250110161910-96195f1bd746
|
8.0.0-20250110161910-96195f1bd746
|
|
github.com/mattermost/mattermost/server/v8
|
Go |
≥ 9.11.0-rc1
< 9.11.8
|
9.11.8
|
|
github.com/mattermost/mattermost/server/v8
|
Go |
≥ 10.2.0-rc1
< 10.2.3
|
10.2.3
|
|
github.com/mattermost/mattermost/server/v8
|
Go |
≥ 10.3.0-rc1
< 10.3.3
|
10.3.3
|
|
github.com/mattermost/mattermost/server/v8
|
Go |
≥ 10.4.0-rc1
< 10.4.2
|
10.4.2
|
References
Frequently Asked Questions
What is CVE-2025-24526?
Which Github.com/mattermost/mattermost/server/v8 versions are affected?
What version fixes CVE-2025-24526?
Is github.com/mattermost/mattermost/server/v8 affected?
What is the CVSS score of CVE-2025-24526?
What CWE is associated with CVE-2025-24526?
How can I check Go dependencies for CVE-2025-24526?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-q8p2-2hwc-jw64",
"modified" : "2025-02-24T18:28:19Z",
"published" : "2025-02-24T09:35:48Z",
"aliases" : [ "CVE-2025-24526" ],
"summary" : "Mattermost fails to restrict channel export of archived channels",
"details" : "Mattermost versions 10.1.x <= 10.1.3, 10.4.x <= 10.4.1, 9.11.x <= 9.11.7, 10.3.x <= 10.3.2, 10.2.x <= 10.2.2 fail to restrict channel export of archived channels when the \"Allow users to view archived channels\" is disabled which allows a user to export channel contents when they shouldn't have access to it",
"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/v8"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "0"
}, {
"fixed" : "8.0.0-20250110161910-96195f1bd746"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost/server/v8"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "9.11.0-rc1"
}, {
"fixed" : "9.11.8"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost/server/v8"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "10.2.0-rc1"
}, {
"fixed" : "10.2.3"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost/server/v8"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "10.3.0-rc1"
}, {
"fixed" : "10.3.3"
} ]
} ]
}, {
"package" : {
"ecosystem" : "Go",
"name" : "github.com/mattermost/mattermost/server/v8"
},
"ranges" : [ {
"type" : "ECOSYSTEM",
"events" : [ {
"introduced" : "10.4.0-rc1"
}, {
"fixed" : "10.4.2"
} ]
} ]
} ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-24526"
}, {
"type" : "WEB",
"url" : "https://github.com/mattermost/mattermost-plugin-channel-export/issues/51"
}, {
"type" : "WEB",
"url" : "https://github.com/mattermost/mattermost-plugin-channel-export/commit/3c052b66207fb734bfc4c948941e7f7522a82550"
}, {
"type" : "WEB",
"url" : "https://github.com/mattermost/mattermost/commit/96195f1bd7467f572525c35b5087acaeb53daa63"
}, {
"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" : "2025-02-24T18:28:19Z",
"nvd_published_at" : "2025-02-24T08:15:10Z"
}
}