CVE-2026-0997 is a medium-severity vulnerability affecting Mattermost server versions 10.11.x, 11.1.x, 11.2.x, and the Mattermost Plugin Zoom version 1.11.0 and earlier. It allows any authenticated user to alter Zoom meeting restrictions for arbitrary channels due to insufficient validation of the authenticated user in the /plugins/zoom/api/v1/channel-preference API endpoint. With a CVSS score of 4.3 (Medium), this vulnerability has a low attack complexity and requires low privileges, but only impacts integrity, with no confidentiality or availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion, though it has received limited media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 10.11.0, <= 10.11.9CPE match | cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:* | ||
>= 11.1.0, <= 11.1.2CPE match | cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:* | ||
>= 11.2.0, <= 11.2.1CPE match | cpe:2.3:a:mattermost:mattermost:*:*:*:*:*:*:*:* | ||
>= 10.11.0, < 10.11.10CPE matchmatch criteria | cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* | ||
>= 11.1.0, < 11.1.3CPE matchmatch criteria | cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/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.