CVE-2025-27571 json
Channel metadata visible in archived channels despite configuration setting
published 2025-04-16 18 mo ago modified 2026-09-10 1 mo ago also GHSA-h4rr-f37j-4hh7 , GO-2025-3619 , EUVD-2025-11358
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 19%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- go github.com/mattermost/mattermost/server/v8 8.0.0-20250218121836-2b5275d87136, 8.0.0-20250314142426-c049748b8863, 9.11.10, 10.4.4, 10.5.2
- go github.com/mattermost/mattermost-server 9.11.10+incompatible, 10.4.4+incompatible, 10.5.2+incompatible
- Mattermost Mattermost 9.11.10, 10.4.4, 10.5.2, 10.6.0
- govulncheck-vulndb openSUSE Tumbleweed 0.0.20250422T181640-1.1
opensuse advisories openSUSE-SU-2025:15017-1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 18 mo ago
Exploit prediction
0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| GitHub | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost/server/v8 | >=10.5.0, <10.5.2 >=10.4.0, <10.4.4 >=9.11.0, <9.11.10 <8.0.0-20250314142426-c049748b8863 <8.0.0-20250218121836-2b5275d87136 |
10.5.2 10.4.4 9.11.10 8.0.0-20250314142426-c049748b8863 8.0.0-20250218121836-2b5275d87136 |
| 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 |
9.11.10+incompatible 10.4.4+incompatible 10.5.2+incompatible |
| go | github.com/mattermost/mattermost-server/v5 | all versions |
no fix listed |
| go | github.com/mattermost/mattermost-server/v6 | all versions |
no fix listed |
Affected products
- Mattermost Mattermost
Classification
- Weakness
-
- CWE-863 Incorrect Authorization
References
-
github.com
/mattermost/mattermost/commit/341186355d982ac4cbe37668d7cdb0cf6275fe44
web
-
github.com
/mattermost/mattermost/commit/629f68a85dd6ed5ba0c51a9356c3a3200f50657f
web
-
github.com
/mattermost/mattermost/commit/8e82d8df61068fc56b0f3e51ef1cc947bc87cec1
web
-
github.com
/mattermost/mattermost/commit/ae8a952bcaaa5f77a92043e2538f625eac72e927
web
-
github.com
/mattermost/mattermost/commit/c6f6b664811795f36b9cf05b0e2b537c44c65bc1
web
-
mattermost.com
/security-updates
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2025-27571
advisory
-
github.com
/mattermost/mattermost
package
-
pkg.go.dev
/vuln/GO-2025-3619
web
-
github.com
/advisories/GHSA-h4rr-f37j-4hh7
advisory
Sources
- CVE List CVE-2025-27571
- GitHub Advisory GHSA-h4rr-f37j-4hh7
- NVD CVE-2025-27571
- OSV GO-2025-3619
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.