CVE-2025-13324: Github.com/mattermost/mattermost Mattermost Has An Invite Token Vulnerability

MODERATE
Advisory Identifier: GHSA-x3r8-2hmh-89f5
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CVSS 4.3
CWE-863
Published
Advisory Summary

CVE-2025-13324 is a MODERATE (CVSS 4.3) mattermost has an invite token vulnerability (CWE-863: Incorrect Authorization) affecting Github.com/mattermost/mattermost libraries in the Go ecosystem. The issue involves mattermost has an invite token replay vulnerability via channel membership manipulation. Remediation is available by upgrading affected packages to version 10.12.2, 10.11.5, 11.0.4, 8.0.0-20251031095924-e7e23b94e006.

CVE-2025-13324 at a Glance

CVE Identifier CVE-2025-13324
GHSA Identifier GHSA-x3r8-2hmh-89f5
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-863: Incorrect Authorization
Affected Product Github.com/mattermost/mattermost
Package Ecosystem Go
Published Date
Last Updated

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).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity Low (I:L)
Availability None (A:N)

How to Fix CVE-2025-13324

To remediate this vulnerability, upgrade all affected Github.com/mattermost/mattermost dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/mattermost/mattermost fixed: 10.12.2 
Upgrade github.com/mattermost/mattermost to 10.12.2
github.com/mattermost/mattermost fixed: 10.11.5 
Upgrade github.com/mattermost/mattermost to 10.11.5
github.com/mattermost/mattermost fixed: 11.0.4 
Upgrade github.com/mattermost/mattermost to 11.0.4
github.com/mattermost/mattermost/server/v8 fixed: 8.0.0-20251031095924-e7e23b94e006 
Upgrade github.com/mattermost/mattermost/server/v8 to 8.0.0-20251031095924-e7e23b94e006
github.com/mattermost/mattermost-server fixed: 11.0.4 
Upgrade github.com/mattermost/mattermost-server to 11.0.4
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/mattermost/mattermost

How to Check if You Are Affected

To determine whether your application is affected by CVE-2025-13324, inspect your project dependencies for Github.com/mattermost/mattermost:

inspect dependencies for github.com/mattermost/mattermost

Analyze the terminal output to locate any version of Github.com/mattermost/mattermost in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 10.12.2), 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, 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

Mattermost versions 10.11.x < 10.11.5, 11.0.x < 11.0.4, 10.12.x < 10.12.2 fail to invalidate remote cluster invite tokens when using the legacy (version 1) protocol or when the confirming party does not provide a refreshed token, which allows an attacker who has obtained an invite token to authenticate as the remote cluster and perform limited actions on shared channels even after the invitation has been legitimately confirmed.

CVE-2025-13324 Affected Github.com/mattermost/mattermost Versions

5 component(s)
Fixed Versions:
10.12.210.11.511.0.48.0.0-20251031095924-e7e23b94e006
Product / Package Ecosystem Affected Versions Fixed Version
github.com/mattermost/mattermost
golang/github.com/mattermost/mattermost
Go
≥ 10.12.0
< 10.12.2
10.12.2
github.com/mattermost/mattermost
golang/github.com/mattermost/mattermost
Go
≥ 10.11.0-rc1
< 10.11.5
10.11.5
github.com/mattermost/mattermost
golang/github.com/mattermost/mattermost
Go
≥ 11.0.0-alpha.1
< 11.0.4
11.0.4
github.com/mattermost/mattermost/server/v8
golang/github.com/mattermost/mattermost/server/v8
Go
< 8.0.0-20251031095924-e7e23b94e006
8.0.0-20251031095924-e7e23b94e006
github.com/mattermost/mattermost-server
golang/github.com/mattermost/mattermost-server
Go
< 11.0.4
11.0.4

References

NVD — CVE-2025-13324 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-13324
Security Fix Commit FIX COMMIT
https://github.com/mattermost/mattermost/commit/364c2203de00fe0d8424b6b46d6f0eeb02a2539a
Security Fix Commit FIX COMMIT
https://github.com/mattermost/mattermost/commit/7ccb62db7958abd6a4b21a06c5a4f5367a8f8b1f
Security Fix Commit FIX COMMIT
https://github.com/mattermost/mattermost/commit/9f54e5cdc3aef412945ff0e6a58338f7b549bdda
Github.com/mattermost/mattermost Source Repository REPOSITORY
https://github.com/mattermost/mattermost
Github.com/mattermost/mattermost Security Information SECURITY
https://mattermost.com/security-updates

Frequently Asked Questions

What is CVE-2025-13324?
CVE-2025-13324 is a security vulnerability in Github.com/mattermost/mattermost involving Mattermost has an Invite Token Replay Vulnerability via Channel Membership Manipulation under CWE-863: Incorrect Authorization.
Which Github.com/mattermost/mattermost versions are affected?
Affected versions include releases prior to 10.12.2, 10.11.5, 11.0.4, 8.0.0-20251031095924-e7e23b94e006 across affected packages: github.com/mattermost/mattermost, github.com/mattermost/mattermost/server/v8, github.com/mattermost/mattermost-server.
What version fixes CVE-2025-13324?
Upgrading to 10.12.2, 10.11.5, 11.0.4, 8.0.0-20251031095924-e7e23b94e006 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/mattermost/mattermost affected?
Yes, github.com/mattermost/mattermost is affected in releases prior to 10.12.2, 10.11.5, 11.0.4. Upgrade your dependency to 10.12.2, 10.11.5, 11.0.4 or later.
Is github.com/mattermost/mattermost/server/v8 affected?
Yes, github.com/mattermost/mattermost/server/v8 is affected in releases prior to 8.0.0-20251031095924-e7e23b94e006. Upgrade your dependency to 8.0.0-20251031095924-e7e23b94e006 or later.
What is the CVSS score of CVE-2025-13324?
CVE-2025-13324 has a CVSS v3.1 base score of 4.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
What CWE is associated with CVE-2025-13324?
CVE-2025-13324 is classified under CWE-863: Incorrect Authorization (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.).
How can I check Go dependencies for CVE-2025-13324?
Run the dependency tree command: 'inspect dependencies for github.com/mattermost/mattermost'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-x3r8-2hmh-89f5",
  "modified" : "2025-12-26T15:17:57Z",
  "published" : "2025-12-17T21:30:48Z",
  "aliases" : [ "CVE-2025-13324" ],
  "summary" : "Mattermost has an Invite Token Replay Vulnerability via Channel Membership Manipulation",
  "details" : "Mattermost versions 10.11.x < 10.11.5, 11.0.x < 11.0.4, 10.12.x < 10.12.2 fail to invalidate remote cluster invite tokens when using the legacy (version 1) protocol or when the confirming party does not provide a refreshed token, which allows an attacker who has obtained an invite token to authenticate as the remote cluster and perform limited actions on shared channels even after the invitation has been legitimately confirmed.",
  "severity" : [ {
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    "score" : "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"
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    },
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      }, {
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    } ]
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    } ]
  }, {
    "package" : {
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    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
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      }, {
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      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/mattermost/mattermost/server/v8"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
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      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/mattermost/mattermost-server"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "11.0.4"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "< 5.3.2-0.20251028000919-d3ed703dc833"
    }
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2025-13324"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mattermost/mattermost/commit/364c2203de00fe0d8424b6b46d6f0eeb02a2539a"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mattermost/mattermost/commit/7ccb62db7958abd6a4b21a06c5a4f5367a8f8b1f"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mattermost/mattermost/commit/9f54e5cdc3aef412945ff0e6a58338f7b549bdda"
  }, {
    "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" : "2025-12-20T17:27:10Z",
    "nvd_published_at" : "2025-12-17T19:16:01Z"
  }
}