CVE-2026-2476 - Vulnerability Details - OpenCVE

Mattermost Plugins versions <=2.0.3.0 fail to properly mask sensitive configuration values which allows an attacker with access to support packets to obtain original plugin settings via exported configuration data. Mattermost Advisory ID: MMSA-2026-00606

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required High

Scope Changed

Confidentiality Impact High

Integrity Impact Low

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 0.00028.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Mattermost

Mattermost

unaffected

Version	Status	Constraints
`0`	affected	≤ 2.0.3
`2.3.1.0`	unaffected	—

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

Update Mattermost Plugins to versions 2.3.1.0 or higher.

Workaround

No workaround given by the vendor.

References

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

History

Mon, 16 Mar 2026 14:15:00 +0000

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

Mon, 16 Mar 2026 11:30:00 +0000

Type	Values Removed	Values Added
Description		Mattermost Plugins versions <=2.0.3.0 fail to properly mask sensitive configuration values which allows an attacker with access to support packets to obtain original plugin settings via exported configuration data. Mattermost Advisory ID: MMSA-2026-00606
Title		MS Teams plugin sensitive config values not properly masked in support packets
Weaknesses		CWE-200
References		https://mattermost.com/security-updates
Metrics		cvssV3_1 `{'score': 7.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N'}`

Projects

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MITRE

Status: PUBLISHED

Assigner: Mattermost

Published: 2026-03-16T11:11:07.387Z

Updated: 2026-03-16T13:49:58.500Z

Reserved: 2026-02-13T15:59:24.864Z

Link: CVE-2026-2476

Vulnrichment

Updated: 2026-03-16T13:44:21.926Z

NVD

Status : Awaiting Analysis

Published: 2026-03-16T14:19:30.373

Modified: 2026-03-16T14:53:07.390

Link: CVE-2026-2476

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-200

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