Vulnerability details

CVE-2026-2476

Mattermost Mattermost

MS Teams plugin sensitive config values not properly masked in support packets

CVSS 3.1

7.6High

Official 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

CVSS scores

Score	Version	Source	Vector
7.6High	3.1	CVEProject cvelistV5 (CNA) (Mattermost)	`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N`

Affected products

Vendor	Product	Versions	Source
Mattermost	Mattermost	v ≤ 2.0.3	CVEProject cvelistV5 (CNA)

References and advisories

https://mattermost.com/security-updates vendor-advisory

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Details

Published: 2026-03-16
Last updated: 2026-03-16
State: Published
Assigner (CNA): Mattermost

Exploit prediction (EPSS)

0.18%

Probability of exploitation in 30 days

8.3%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: None
Technical impact: Partial

Weaknesses (CWE)

CWE-200
Exposure of Sensitive Information to an Unauthorized Actor