CVE-2025-71278CWE-863

XenForo OAuth2 Unauthorized Scope Request

High · published April 1, 2026

CVSS v4.0
8.7
EPSS
0%
Percentile
17.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00265 · 17.5th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-04-01T00:30Z
EPSS history
Timeline
  • 01 APR 00:30Z
    XenForo OAuth2 Unauthorized Scope Request
    cvelistv5