CVE-2025-13767 - Vulnerability Details - OpenCVE

Mattermost versions 11.1.x <= 11.1.0, 11.0.x <= 11.0.5, 10.12.x <= 10.12.3, 10.11.x <= 10.11.7 fails to validate user channel membership when attaching Mattermost posts as comments to Jira issues, 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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00025.

Exploitation none

Automatable no

Technical Impact partial

No data.

No data.

No data.

No data.

Advisories

No advisories yet.

Fixes

Solution

Update Mattermost to versions 11.2.0, 11.1.1, 11.0.6, 10.12.4, 10.11.8 or higher.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://mattermost.com/security-updates

History

Wed, 24 Dec 2025 17:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Wed, 24 Dec 2025 08:15:00 +0000

Type	Values Removed	Values Added
Description		Mattermost versions 11.1.x <= 11.1.0, 11.0.x <= 11.0.5, 10.12.x <= 10.12.3, 10.11.x <= 10.11.7 fails to validate user channel membership when attaching Mattermost posts as comments to Jira issues, 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.
Title		Unauthorized Read Access to Private Channel Posts via Mattermost Jira Plugin
Weaknesses		CWE-863
References		https://mattermost.com/security-updates
Metrics		cvssV3_1 `{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'}`

Projects

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MITRE

Status: PUBLISHED

Assigner: Mattermost

Published: 2025-12-24T08:01:27.157Z

Updated: 2025-12-24T16:36:22.999Z

Reserved: 2025-11-27T18:02:05.323Z

Link: CVE-2025-13767

Vulnrichment

Updated: 2025-12-24T16:36:17.251Z

NVD

Status : Received

Published: 2025-12-24T08:15:45.553

Modified: 2025-12-24T08:15:45.553

Link: CVE-2025-13767

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-863

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