CVE-2026-0998 — Missing Authorization in Mattermost Mattermost-plugin-zoom

CWE-862 — Missing Authorization6 documents5 sources
Severity
4.3MEDIUMNVD
EPSS
0.0%
top 89.52%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
Github.com Mattermost Mattermost-plugin-zoomMattermost ServerMattermost+1 more
Timeline
PublishedFeb 16
Latest updateFeb 23

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

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:NExploitability: 2.8 | Impact: 1.4

Affected Packages4 packages

▶NVDmattermost/zoom1.11.0
▶NVDmattermost/mattermost_server10.11.0 — 10.11.10+2
▶CVEListV5mattermost/mattermost11.1.0 — 11.1.2+2

🔴Vulnerability Details

4
OSV
Mattermost Plugin Zoom fail to validate user identity and post ownership in the {{/api/v1/askPMI}} endpoint in github.com/mattermost/mattermost-plugin-zoom↗2026-02-23
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OSV
Mattermost Plugin Zoom fail to validate user identity and post ownership in the {{/api/v1/askPMI}} endpoint↗2026-02-16
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CVEList
Mattermost Zoom Plugin allows unauthorized meeting creation and post modification via insufficient API access controls↗2026-02-16
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GHSA
Mattermost Plugin Zoom fail to validate user identity and post ownership in the {{/api/v1/askPMI}} endpoint↗2026-02-16
▶

🕵️Threat Intelligence

1
Wiz
CVE-2026-0998 Impact, Exploitability, and Mitigation Steps | Wiz↗
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CVE-2026-0998 — Missing Authorization | cvebase