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CVE PROGRAM SOURCE RECORD4.3 Medium

CVE-2026-0998

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

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

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Mattermost Mattermost

Default version status: unaffected

  • 11.1.0 to ≤ 11.1.2affected
  • 10.11.0 to ≤ 10.11.9affected
  • 11.2.0 to ≤ 11.2.1affected
  • 11.3.0unaffected
  • 11.1.3unaffected
  • 10.11.10unaffected
  • 11.2.2unaffected

References