Medium severity · published Sep 15, 2025
CVE-2025-9084
Open redirect in OAuth login
6.1
CVSS
0.2%
EPSS
No
On KEV
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:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 7% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MA
Mattermost · Mattermost
10.5.0 through 10.5.9 · source: vendor
MS
Mattermost Server · Mattermost
10.5.0 before 10.5.10 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-9084
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-9084
Vendor Advisory
https://mattermost.com/security-updates
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