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VULNERABILITIES

CVE-2026-73310 Details

Description

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.

Metrics

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://bombobombone.github.io/posts/cve-2026-73310/ [email protected]ExploitThird Party Advisory
https://github.com/BomboBombone/CVE-2026-73310 [email protected]ExploitThird Party Advisory
https://www.vulncheck.com/advisories/xenforo-oauth2-authorization-code-token-theft-via-redirect-uri-bypass [email protected]Third Party Advisory
https://xenforo.com/community/threads/security-fixes-released-for-all-xenforo-and-media-gallery-versions-2-2-0-2-3-12.239856/ [email protected]Release Notes
https://xenforo.com/community/threads/xenforo-2-3-13-and-add-ons-released-includes-security-fixes.239857/ [email protected]Release Notes

Weakness Enumeration

CWE-IDCWE NameSource
CWE-863Incorrect Authorization[email protected]

Affected Products

ProductVersions
xenforo xenforo
< 2.3.13

CPE

  • cpe:2.3:a:xenforo:xenforo:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-73310
NVD Published Date:
Sep 8, 2026
NVD Last Modified:
Sep 11, 2026
Source:
[email protected]
CVE-2026-73310 Details - Not Deferred