CVE-2025-71278

HIGH SEVERITY

CVSS Score & Metrics

Base Score

8.8 / 10

Vector String

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

Vulnerability Description

XenForo before 2.3.5 allows OAuth2 client applications to request unauthorized scopes. This affects any customer using OAuth2 clients on any version of XenForo 2.3 prior to 2.3.5, potentially allowing client applications to gain access beyond their intended authorization level.

Vulnerability Details

Published Date

April 01, 2026

Last Modified

April 01, 2026

CWE ID

CWE-863

Source

NVD

Vendor

XenForo

Product

XenForo

External References

https://www.vulncheck.com/advisories/xenforo-oauth2-unauthorized-scope-request
https://xenforo.com/community/threads/xenforo-2-3-5-includes-security-fix-add-ons-released.228812/

CVE-2025-71278

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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