high8.8
CVE-2025-71278
XenForo before 2.3.5 allows OAuth2 client applications to request unauthorized scopes.
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Xenforo | Xenforo | from 2.3.0 before 2.3.5 |