XenForo before 2.3.5 allows OAuth2 client applications to request unauthorized scopes.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Apr 1, 2026 · NIST NVD

   Detected

   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.

2. Jun 17, 2026 · NIST NVD

   Updated

   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

• cpe xenforo/xenforoversion unspecified

Sources

• CVE.orgVulnerability recordCVE-2025-71278

  Official CVE identifier

  cve.org
• NIST NVDVulnerability recordCVE-2025-71278

  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.

  nvd.nist.gov

References

• Third Party Advisory · vulncheck.com
• Release Notes · xenforo.com