CVE-2025-41436 json
Unauthorized access to archived channel content via threads interface
published 2025-11-14 11 mo ago modified 2026-10-19 21 d ago also GHSA-x3hx-ch7p-8xgg , GO-2025-4131 , EUVD-2025-186557
- cvss
- 3.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 7%
- public exploits
- 0
- none known
Summary
Mattermost versions <11.0 fail to properly enforce the "Allow users to view archived channels" setting which allows regular users to access archived channel content and files via the "Open in Channel" functionality from followed threads
Patch / fix
- go github.com/mattermost/mattermost-server 11.0.0-alpha.1, 11.0.0-alpha.1+incompatible
- go github.com/mattermost/mattermost/server/v8 8.0.0-20250815165020-c8d66301415d
- Mattermost Mattermost 11.0.0
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
opensuse advisories openSUSE-SU-2026:21483-1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 11 mo ago
Exploit prediction
0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 3.1 | CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N |
| NVD | 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 | 3.1 | CVSS:3.1/AV:N/AC:H/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 | <11.0.0-alpha.1 <11.0.0-alpha.1+incompatible |
11.0.0-alpha.1 11.0.0-alpha.1+incompatible |
| go | github.com/mattermost/mattermost/server/v8 | <8.0.0-20250815165020-c8d66301415d |
8.0.0-20250815165020-c8d66301415d |
| 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
Sources
- CVE List CVE-2025-41436
- GitHub Advisory GHSA-x3hx-ch7p-8xgg
- NVD CVE-2025-41436
- OSV GO-2025-4131
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