CVE-2025-71278
XenForo OAuth2 Unauthorized Scope Request
CVSS Score
8.8
EPSS Score
0.0%
EPSS Percentile
12th
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.
| CWE | CWE-863 |
| Vendor | xenforo |
| Product | xenforo |
| Published | Apr 1, 2026 |
| Last Updated | Apr 1, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
XenForo / XenForo
2.3.0 < 2.3.5