CVE-2025-9084 — Open Redirect in Mattermost Mattermost-server

CWE-601 — Open Redirect6 documents5 sources
Severity
6.1MEDIUMNVD
CNA3.1
EPSS
0.0%
top 91.37%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
Github.com Mattermost Mattermost-serverGithub.com Mattermost Mattermost Server V8Mattermost Server+1 more
Timeline
PublishedSep 15
Latest updateSep 17

Description

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

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NExploitability: 2.8 | Impact: 2.7

Affected Packages4 packages

▶NVDmattermost/mattermost_server10.5.0 — 10.5.10
▶Gogithub.com/mattermost_mattermost_server_v8< 8.0.0-202508080704-39bd251fe4f600
▶CVEListV5mattermost/mattermost10.5.0 — 10.5.9

🔴Vulnerability Details

4
OSV
Mattermost Open Redirect vulnerability in github.com/mattermost/mattermost-server↗2025-09-17
▶
GHSA
Mattermost Open Redirect vulnerability↗2025-09-15
▶
CVEList
Open redirect in OAuth login↗2025-09-15
▶
OSV
Mattermost Open Redirect vulnerability↗2025-09-15
▶
CVE-2025-9084 — Open Redirect | cvebase