CVE-2025-71278
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.
SeverityHigh
CVSS8.8
Exploit probability—
Product
Xenforo
PublishedApr 1, 2026
First seenApr 1, 2026
Weakness typeCWE-863Incorrect authorization
How to fix
Update
- xenforo xenforo2.3.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| xenforo xenforo | 2.3.0 ≤ v < 2.3.5 | 2.3.5 |
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