CVE-2026-2476 | BDVDB-2026-320697 Detail

MattermostMattermost

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

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact low, availability impact none. Attack vector: network.

Weaknesses#

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References#

https://mattermost.com/security-updates

Exploit#

No public exploit known

History#

Version 12026-03-16Record published in the CVE List.

Published

Published: 2026-03-16
Last modified: 2026-03-16

Vendor information

Vendor: Mattermost
Product: Mattermost

All Mattermost vulnerabilities

Score

7.6 High

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 8.3.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Information Disclosure

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
<= 2.0.3
Fixed
Not stated
Vulnerable
Not stated
Fixed
2.3.1.0

Scoring System

CVSS v4.0

Not available

CVSS v3.1

7.6 High

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	High
User Interaction	None
Scope	Changed
Confidentiality	High
Integrity	Low
Availability	None

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).