Home

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

PUBLISHED Reserved 2026-01-15 | Published 2026-02-16 | Updated 2026-02-17 | Assigner Mattermost




MEDIUM: 4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Problem types

CWE-862: Missing Authorization

Product status

Default status
unaffected

11.1.0 (semver)
affected

10.11.0 (semver)
affected

11.2.0 (semver)
affected

11.3.0
unaffected

11.1.3
unaffected

10.11.10
unaffected

11.2.2
unaffected

Credits

daw10 finder

References

mattermost.com/security-updates (MMSA-2025-00534) vendor-advisory

cve.org (CVE-2026-0998)

nvd.nist.gov (CVE-2026-0998)

Download JSON