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CVE PROGRAM SOURCE RECORD4.3 Medium

CVE-2026-22892

Insufficient Authorization in Mattermost Jira Plugin Allows Unauthorized Access to Post Attachments

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Status
Published
Published
Updated
Assigning organization
Mattermost

Description

Mattermost versions 11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1 fail to validate user permissions when creating Jira issues from Mattermost posts, which allows an authenticated attacker with access to the Jira plugin to read post content and attachments from channels they do not have access to via the /create-issue API endpoint by providing the post ID of an inaccessible post.. Mattermost Advisory ID: MMSA-2025-00550

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