CVE-2025-9084 json
Open redirect in OAuth login
published 2025-09-15 13 mo ago modified 2026-10-19 20 d ago also GHSA-hm95-jx66-g2gh , GO-2025-3960 , EUVD-2025-29172
- 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 6%
- public exploits
- 0
- none known
Summary
Mattermost versions 10.5.x <= 10.5.9 fail to properly validate redirect URLs which allows attackers to redirect users to malicious sites via crafted OAuth login URLs
Patch / fix
- go github.com/mattermost/mattermost/server/v8 8.0.0-202508080704-39bd251fe4f600
- go github.com/mattermost/mattermost-server 10.5.10, 10.5.10+incompatible
- Mattermost Mattermost 10.5.10, 10.11.0
- govulncheck-vulndb SLE Module for Package Hub 15 SP6, openSUSE Leap 15.6 0.0.20250918T182144-150000.1.107.1
suse advisories SUSE-SU-2025:03289-1
- govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
- govulncheck-vulndb openSUSE Tumbleweed 0.0.20250917T170349-1.1
opensuse advisories openSUSE-SU-2026:21483-1openSUSE-SU-2025:15564-1
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 13 mo ago
Exploit prediction
0.17% chance of exploitation in the next 30 days, higher than 6% 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:N/UI:R/S:U/C:N/I:L/A:N |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| GitHub | 3.1 | 3.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| go | github.com/mattermost/mattermost/server/v8 | <8.0.0-202508080704-39bd251fe4f600 all versions |
8.0.0-202508080704-39bd251fe4f600 |
| go | github.com/mattermost/mattermost-server | >=10.5.0, <10.5.10 >=10.5.0+incompatible, <10.5.10+incompatible |
10.5.10 10.5.10+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-601 URL Redirection to Untrusted Site
References
Sources
- CVE List CVE-2025-9084
- GitHub Advisory GHSA-hm95-jx66-g2gh
- NVD CVE-2025-9084
- OSV GO-2025-3960
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.