Is CVE-2025-71278 actively exploited?

No active exploitation of CVE-2025-71278 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2025-71278 be exploited remotely?

Yes. CVE-2025-71278 is exploitable remotely over the network (CVSS attack vector: Network).

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

CVE-2025-71278 has a CVSS score of 8.8 (HIGH).

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HIGH

CVE-2025-71278

CWE-863Published: April 1, 2026· Updated: Apr 1, 2026

8.8

CVSS v3.1

EPSS:0.04%probability of exploitation in 30 daysPercentile:11.8th

Official 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.

NVD Source

Technical Analysis

CVE-2025-71278 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.8.