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CVE-2025-71278
Published: Apr 1, 2026
Modified: Apr 1, 2026
PUBLISHED
CVSS v3.1
8.8
HIGH
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.
| Vendor | Product | Versions |
|---|---|---|
XenForo | XenForo | affected 2.3.0 - < 2.3.5 |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
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
References
XenForo 2.3.5 (Includes Security Fix) & Add-ons Released
vendor-advisory
patch
VulnCheck Advisory: XenForo OAuth2 Unauthorized Scope Request
third-party-advisory
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