medium4.3
CVE-2025-27571
Mattermost Incorrect Authorization vulnerability
Impact
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
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost/server/v8 | >= 10.5.0, < 10.5.2 | 10.5.2 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Mattermost | Mattermost Server | from 9.11.0 before 9.11.10 from 10.4.0 before 10.4.4 from 10.5.0 before 10.5.2 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://mattermost.com/security-updates
- https://github.com/advisories/GHSA-h4rr-f37j-4hh7
- https://nvd.nist.gov/vuln/detail/CVE-2025-27571
- https://github.com/mattermost/mattermost/commit/341186355d982ac4cbe37668d7cdb0cf6275fe44
- https://github.com/mattermost/mattermost/commit/629f68a85dd6ed5ba0c51a9356c3a3200f50657f
- https://github.com/mattermost/mattermost/commit/8e82d8df61068fc56b0f3e51ef1cc947bc87cec1
- https://github.com/mattermost/mattermost/commit/ae8a952bcaaa5f77a92043e2538f625eac72e927
- https://github.com/mattermost/mattermost/commit/c6f6b664811795f36b9cf05b0e2b537c44c65bc1
- https://pkg.go.dev/vuln/GO-2025-3619