CVE-2025-71278
XenForo OAuth2 Unauthorized Scope Request
- State
- Published
- Severity
- 8.7 High
- Published
- Apr 1, 2026
- Updated
- Apr 1, 2026
- Reserved
- Apr 1, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.7 High | 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 | VulnCheck |
| 3.1 | 8.8 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-863 Incorrect Authorization
Affected Products
| Product | Versions |
|---|---|
XenForoXenForo |
|
References
- XenForo 2.3.5 (Includes Security Fix) & Add-ons Releasedvendor-advisorypatch
- VulnCheck Advisory: XenForo OAuth2 Unauthorized Scope Requestthird-party-advisory
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