CVE-2025-71278

HIGH

8.8

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.

CVE Details

CVSS v3.1 Score8.8

SeverityHIGH

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published4/1/2026

Last Modified4/1/2026

Sourcenvd

Honeypot Sightings0

Affected Products

xenforo:xenforo

Weaknesses (CWE)

CWE-863

References

https://www.vulncheck.com/advisories/xenforo-oauth2-unauthorized-scope-request(disclosure@vulncheck.com)

https://xenforo.com/community/threads/xenforo-2-3-5-includes-security-fix-add-ons-released.228812/(disclosure@vulncheck.com)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.