CVE-2026-22892
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Permission Bypass in Mattermost Jira Plugin Allows Data Exposure

Publication date: 2026-02-13

Last updated on: 2026-02-18

Assigner: Mattermost, Inc.

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

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Meta Information

Published
2026-02-13
Last Modified
2026-02-18
Generated
2026-07-06
AI Q&A
2026-02-13
EPSS Evaluated
2026-07-05
NVD
CVE-2026-22892
EUVD
EUVD-2026-7377

Affected Vendors & Products

Showing 3 associated CPEs
Vendor Product Version / Range
mattermost mattermost_server From 10.11.0 (inc) to 10.11.10 (exc)
mattermost mattermost_server From 11.0.0 (inc) to 11.1.3 (exc)
mattermost mattermost_server From 11.2.0 (inc) to 11.2.2 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-863 The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

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Executive Summary

This vulnerability affects certain versions of Mattermost (11.1.x <= 11.1.2, 10.11.x <= 10.11.9, 11.2.x <= 11.2.1) where the system fails to properly validate user permissions when creating Jira issues from Mattermost posts.

An authenticated attacker who has access to the Jira plugin can exploit this flaw by using the /create-issue API endpoint with the post ID of a post they do not have permission to access.

This allows the attacker to read the content and attachments of posts from channels they are not authorized to view.

Impact Analysis

The vulnerability can lead to unauthorized disclosure of sensitive information because an attacker with Jira plugin access can read posts and attachments from restricted channels.

This could result in exposure of confidential or private data to unauthorized users.

The CVSS base score of 4.3 indicates a low to medium severity impact, specifically affecting confidentiality without impacting integrity or availability.

Compliance Impact

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