Is CVE-2025-71278 actively exploited?

CVE-2025-71278 has no public evidence of in-the-wild exploitation as of 2026-04-01.

What is the CVSS score for CVE-2025-71278?

CVE-2025-71278 has a CVSS score of 8.7 (HIGH severity). Vector: 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X.

How do I patch CVE-2025-71278?

Patch guidance is available from xenforo security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2025-71278.

Fix CVE-2025-71278 - HIGH xenforo xenforo

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.

CVSS Metrics

Vector: 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector: network
Complexity: low
Privileges: low
User Action: none
Confidentiality: undefined
Integrity: undefined
Availability: undefined
Weaknesses: CWE-863 · Incorrect Authorization

Metadata

Primary Vendor: XENFORO
Published: 4/1/2026
Last Modified: 4/1/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

xenforo : xenforo

Remediation Guidance

Executive Summary

Cite this page

CVE-2025-71278. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2025-71278

View on NIST NVD

CVE-2025-71278 vulnerability