CVE-2026-73310 — XenForo < 2.3.13 OAuth2 Authorization Code Token Theft via redirect_uri Bypass
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 b…
Published: 2026-09-08 · CVSS: 8.2 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7