CVE-2026-22892: 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…

PriorityP424medium4.3CVSS 3.1

AVNACLPRLUINSUCLINAN

EPSS

0.24%

15.0th percentile

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

12 ranges

Vendor	Product	Version range	Fixed in
github.com	mattermost_mattermost-server	>= 10.11.0 < 10.11.10	10.11.10
github.com	mattermost_mattermost-server	>= 10.11.0+incompatible < 10.11.10+incompatible	10.11.10+incompatible
github.com	mattermost_mattermost-server	>= 11.1.0 < 11.1.3	11.1.3
github.com	mattermost_mattermost-server	>= 11.1.0+incompatible < 11.1.3+incompatible	11.1.3+incompatible
github.com	mattermost_mattermost-server	>= 11.2.0 < 11.2.2	11.2.2
github.com	mattermost_mattermost-server	>= 11.2.0+incompatible < 11.2.2+incompatible	11.2.2+incompatible
mattermost	mattermost	10.11.0 – 10.11.9	—
mattermost	mattermost	11.1.0 – 11.1.2	—
mattermost	mattermost	11.2.0 – 11.2.1	—
mattermost	mattermost_server	>= 10.11.0 < 10.11.10	10.11.10
mattermost	mattermost_server	>= 11.0.0 < 11.1.3	11.1.3
mattermost	mattermost_server	>= 11.2.0 < 11.2.2	11.2.2

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