CVE-2023-48732
MEDIUM4.3EPSS 0.58%Mattermost notified all users in the channel when using WebSockets to respond individually
Published: 1/2/2024Modified: 2/4/2026
Description
Mattermost fails to scope the WebSocket response around notified users to a each user separately resulting in the WebSocket broadcasting the information about who was notified about a post to everyone else in the channel.
Affected packages (7)
- Bitnami/mattermostfrom 0, < 8.1.7
- Go/github.com/mattermost/mattermost-serverfrom 0, < 8.1.7+incompatible
- Go/github.com/mattermost/mattermost-server/v5from 0
- Go/github.com/mattermost/mattermost-server/v6from 0, < 8.1.7
- Go/github.com/mattermost/mattermost-server/v6from 0
- Go/github.com/mattermost/mattermost/server/v8from 0
- Go/github.com/mattermost/mattermost/server/v8from 0, < 8.1.7
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N |
| osv | CVSS 3.1 | MEDIUM4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |