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.

INFO

Published Date :

2026-04-01T00:30:08.405Z

Last Modified :

2026-04-01T15:52:08.811Z

Source :

VulnCheck
AFFECTED PRODUCTS

The following products are affected by CVE-2025-71278 vulnerability.

Vendors Products
Xenforo
  • Xenforo
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2025-71278.

URL Resource
https://www.vulncheck.com/advisories/xenforo-oauth2-unauthorized-scope-request cve-icon cve-icon
https://xenforo.com/community/threads/xenforo-2-3-5-includes-security-fix-add-ons-released.228812/ cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact