Cloudanix VulnDB

CVE-2026-73310

Medium · 5.9

CVSS

5.9

EPSS

0.5%

Published

Sep 8, 2026

CISA due date

—

The record

XenForo before 2.3.13 contains an authorization flaw in the OAuth2 token endpoint that allows attackers controlling any allowlisted redirect URI to bypass redirect URI binding by submitting a different allowlisted URI than the one recorded at authorization time. Attackers can exchange an intercepted authorization code using a mismatched redirect URI to steal OAuth2 tokens from intercepted authorization flows.

Affected packages

Ecosystem Package Introduced Fixed

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