CVE-2026-22892
Permission Bypass in Mattermost Jira Plugin Allows Data Exposure
Publication date: 2026-02-13
Last updated on: 2026-02-18
Assigner: Mattermost, Inc.
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| 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 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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know