CVE-2026-2476 is a medium-severity vulnerability affecting Mattermost Plugins up to version 2.0.3.0, including the MS Teams integration, where sensitive configuration values are not properly masked in exported support packets. An attacker with low privileges and access to these packets can obtain original plugin settings, leading to a low impact on confidentiality (CVSS 4.3, Medium). There is currently no evidence of active exploitation, nor are public exploit codes available (Metasploit, Nuclei, ExploitDB). While not listed on the KEV catalog, the vulnerability has received some community discussion, indicating awareness.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 0, <= 2.0.3CPE match | cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:* | ||
< 2.3.1CPE matchmatch criteria | cpe:2.3:a:mattermost:ms_teams:*:*:*:*:*:mattermost:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:N
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.