SecuriTricks - CVE-2025-9084

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

Product(s) Impacted

Vendor	Product	Versions
Mattermost	Mattermost Server	*

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-601

URL Redirection to Untrusted Site ('Open Redirect')

A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks.

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	mattermost	mattermost_server	/	/	/	/	/	/	/	/

References

https://mattermost.com/security-updates

CVSS Score

3.1 / 10

CVSS Data - 3.1

Attack Vector: NETWORK
Attack Complexity: HIGH
Privileges Required: NONE
Scope: UNCHANGED
Confidentiality Impact: NONE
Integrity Impact: LOW
Availability Impact: NONE

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N

View Vector String

Timeline

Published: Sept. 15, 2025, 11:15 a.m.
Last Modified: Sept. 16, 2025, 3:59 p.m.

Status : Analyzed

CVE is currently being analyzed by NVD staff, this process results in association of reference link tags, CVSS scores, CWE association, and CPE applicability statements.

More info

Source

responsibledisclosure@mattermost.com

CVE-2025-9084