CVE-2026-0998: Github.com/mattermost/mattermost plugin zoom Mattermost Plugin Zoom Fail To Vulnerability

MODERATE
Advisory Identifier: GHSA-w65c-fvp5-fvc5
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CVSS 4.3
CWE-862
Published
Advisory Summary

CVE-2026-0998 is a MODERATE (CVSS 4.3) mattermost plugin zoom fail to vulnerability (CWE-862: Missing Authorization) affecting Github.com/mattermost/mattermost plugin zoom libraries in the Go ecosystem. The issue involves mattermost plugin zoom fail to validate user identity and post ownership in the {{/api/v1/askpmi}} endpoint. Remediation is available by upgrading affected packages to version 1.12.0.

CVE-2026-0998 at a Glance

CVE Identifier CVE-2026-0998
GHSA Identifier GHSA-w65c-fvp5-fvc5
Severity MODERATE
CVSS v3.1 Base Score 4.3
CWE Classification CWE-862: Missing Authorization
Affected Product Github.com/mattermost/mattermost plugin zoom
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-2026-0998

To remediate this vulnerability, upgrade all affected Github.com/mattermost/mattermost plugin zoom 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-plugin-zoom fixed: 1.12.0 
Upgrade github.com/mattermost/mattermost-plugin-zoom to 1.12.0
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-plugin-zoom

How to Check if You Are Affected

To determine whether your application is affected by CVE-2026-0998, inspect your project dependencies for Github.com/mattermost/mattermost plugin zoom:

inspect dependencies for github.com/mattermost/mattermost-plugin-zoom

Analyze the terminal output to locate any version of Github.com/mattermost/mattermost plugin zoom in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.12.0), 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-862: Missing Authorization, where the product does not perform an authorization check when an actor attempts to access a resource or perform an action. In Github.com/mattermost/mattermost plugin zoom, 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 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 and Mattermost Plugin Zoom versions <=1.11.0 fail to validate user identity and post ownership in the {{/api/v1/askPMI}} endpoint which allows unauthorized users to start Zoom meetings as any user and overwrite arbitrary posts via direct API calls with manipulated user IDs and post data.. Mattermost Advisory ID: MMSA-2025-00534

CVE-2026-0998 Affected Github.com/mattermost/mattermost plugin zoom Versions

1 component(s)
Fixed Versions:
1.12.0
Product / Package Ecosystem Affected Versions Fixed Version
github.com/mattermost/mattermost-plugin-zoom
golang/github.com/mattermost/mattermost-plugin-zoom
Go
< 1.12.0
1.12.0

References

NVD — CVE-2026-0998 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-0998
Security Fix Commit FIX COMMIT
https://github.com/mattermost/mattermost-plugin-zoom/commit/a8b58c43625ab25746e451acc4f71515d52c8122
Github.com/mattermost/mattermost plugin zoom Source Repository REPOSITORY
https://github.com/mattermost/mattermost-plugin-zoom
Github.com/mattermost/mattermost plugin zoom Security Information SECURITY
https://mattermost.com/security-updates

Frequently Asked Questions

What is CVE-2026-0998?
CVE-2026-0998 is a security vulnerability in Github.com/mattermost/mattermost plugin zoom involving Mattermost Plugin Zoom fail to validate user identity and post ownership in the {{/api/v1/askPMI}} endpoint under CWE-862: Missing Authorization.
Which Github.com/mattermost/mattermost plugin zoom versions are affected?
Affected versions include releases prior to 1.12.0 across affected packages: github.com/mattermost/mattermost-plugin-zoom.
What version fixes CVE-2026-0998?
Upgrading to 1.12.0 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/mattermost/mattermost-plugin-zoom affected?
Yes, github.com/mattermost/mattermost-plugin-zoom is affected in releases prior to 1.12.0. Upgrade your dependency to 1.12.0 or later.
What is the CVSS score of CVE-2026-0998?
CVE-2026-0998 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-2026-0998?
CVE-2026-0998 is classified under CWE-862: Missing Authorization (The product does not perform an authorization check when an actor attempts to access a resource or perform an action.).
How can I check Go dependencies for CVE-2026-0998?
Run the dependency tree command: 'inspect dependencies for github.com/mattermost/mattermost-plugin-zoom'. 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-w65c-fvp5-fvc5",
  "modified" : "2026-02-19T19:34:39Z",
  "published" : "2026-02-16T12:30:24Z",
  "aliases" : [ "CVE-2026-0998" ],
  "summary" : "Mattermost Plugin Zoom fail to validate user identity and post ownership in the {{/api/v1/askPMI}} endpoint",
  "details" : "Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 and Mattermost Plugin Zoom versions <=1.11.0 fail to validate user identity and post ownership in the {{/api/v1/askPMI}} endpoint which allows unauthorized users to start Zoom meetings as any user and overwrite arbitrary posts via direct API calls with manipulated user IDs and post data.. Mattermost Advisory ID: MMSA-2025-00534",
  "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-plugin-zoom"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.12.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-0998"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mattermost/mattermost-plugin-zoom/commit/a8b58c43625ab25746e451acc4f71515d52c8122"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/mattermost/mattermost-plugin-zoom"
  }, {
    "type" : "WEB",
    "url" : "https://mattermost.com/security-updates"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-862" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-19T19:34:39Z",
    "nvd_published_at" : "2026-02-16T10:16:07Z"
  }
}