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CVE Vulnerability Details :

CVE-2026-0998

PUBLISHED

More Info Official Page

Assigner-Mattermost

Assigner Org ID-9302f53e-dde5-4bf3-b2f2-a83f91ac0eee

Published At-16 Feb, 2026 | 09:54

Updated At-16 Feb, 2026 | 09:54

▼CVE Numbering Authority (CNA)

Mattermost Zoom Plugin allows unauthorized meeting creation and post modification via insufficient API access controls

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

Affected Products

Vendor

Mattermost, Inc.

Product

Mattermost

Default Status

unaffected

Versions

Affected

From 11.1.0 through 11.1.2 (semver)
From 10.11.0 through 10.11.9 (semver)
From 11.2.0 through 11.2.1 (semver)

Unaffected

11.3.0
11.1.3
10.11.10
11.2.2

Problem Types

Type	CWE ID	Description
CWE	CWE-862	CWE-862: Missing Authorization

Type: CWE

CWE ID: CWE-862

Description: CWE-862: Missing Authorization

Metrics

Version	Base score	Base severity	Vector
3.1	4.3	MEDIUM	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Version: 3.1

Base score: 4.3

Base severity: MEDIUM

Vector:

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Solutions

Update Mattermost to versions 11.3.0, 11.1.3, 10.11.10, 11.2.2 or higher. Alternatively, update Mattermost Zoom Plugin to version 1.12.0 or higher

Credits

finder

daw10

References

Hyperlink	Resource
https://mattermost.com/security-updates	vendor-advisory

Hyperlink: https://mattermost.com/security-updates

Resource:

vendor-advisory

Affected Products

Affected

Unaffected

Problem Types

Metrics

Metrics Other Info

Impacts

Solutions

Configurations

Workarounds

Exploits

Credits

Timeline

Replaced By

Rejected Reason

References