CVE-2025-27571
MEDIUM4.3EPSS 0.16%Mattermost Incorrect Authorization vulnerability
Published: 4/16/2025Modified: 2/4/2026
Description
Mattermost versions 10.5.x <= 10.5.1, 10.4.x <= 10.4.3, 9.11.x <= 9.11.9 fail to check the "Allow Users to View Archived Channels" configuration when fetching channel metadata of a post from archived channels, which allows authenticated users to access such information when a channel is archived.
Affected packages (5)
- Go/github.com/mattermost/mattermost-server>= 9.11.0+incompatible, < 9.11.10+incompatible, >= 10.4.0+incompatible, < 10.4.4+incompatible, >= 10.5.0+incompatible, < 10.5.2+incompatible
- Go/github.com/mattermost/mattermost-server/v5from 0
- Go/github.com/mattermost/mattermost-server/v6from 0
- Go/github.com/mattermost/mattermost/server/v8>= 10.5.0, < 10.5.2
- Go/github.com/mattermost/mattermost/server/v8from 0, < 8.0.0-20250218121836-2b5275d87136
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| 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 |
References (10)
- ADVISORYhttps://github.com/advisories/GHSA-h4rr-f37j-4hh7
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2025-27571
- PATCHhttps://github.com/mattermost/mattermost
- WEBhttps://github.com/mattermost/mattermost/commit/341186355d982ac4cbe37668d7cdb0cf6275fe44
- WEBhttps://github.com/mattermost/mattermost/commit/629f68a85dd6ed5ba0c51a9356c3a3200f50657f
- WEBhttps://github.com/mattermost/mattermost/commit/8e82d8df61068fc56b0f3e51ef1cc947bc87cec1
- WEBhttps://github.com/mattermost/mattermost/commit/ae8a952bcaaa5f77a92043e2538f625eac72e927
- WEBhttps://github.com/mattermost/mattermost/commit/c6f6b664811795f36b9cf05b0e2b537c44c65bc1
- WEBhttps://mattermost.com/security-updates
- WEBhttps://pkg.go.dev/vuln/GO-2025-3619