CVE-2026-0998

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

Published: Feb 16, 2026Updated: Feb 18, 2026 Sources: CVE List NVD GHSACWE-862

4.3MEDIUM

Description

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

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:LPrivileges Required

Low

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:NConfidentiality

None

I:LIntegrity

Low

A:NAvailability

None

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Weaknesses

CWE-862

Affected Products

Mattermost

commercial·US

mattermost serverOn-premWeb App

Communications / messaging-chat

zoomSaaS

Communications / video-conferencing

MattermostOn-premWeb App

Communications / messaging-chat

package-ecosystem

github.com/mattermost/mattermost-plugin-zoom

OSS Libraries

Exploitability

Official Patch Available

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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Initial Access

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References

https://mattermost.com/security-updates

mattermost.com

https://nvd.nist.gov/vuln/detail/CVE-2026-0998

nvd.nist.gov

https://github.com/mattermost/mattermost-plugin-zoom/commit/a8b58c43625ab25746e451acc4f71515d52c8122

github.com

and 1 more references View all →

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