CVE-2026-73313

XenForo versions before 2.3.13 contain an MFA bypass vulnerability in the passkey TFA provider . During the WebAuthn assertion step, the passkey verification path performs a global credential lookup without validating that the matched credential belongs to the user whose login is pending. This al...

CVE-2026-73313 XenForo < 2.3.13 MFA Bypass via Passkey TFA Provider

XenForo before 2.3.13 contains a multi-factor authentication bypass vulnerability in the passkey TFA provider that allows an authenticated attacker to complete login as another user by submitting their own registered passkey credential during the WebAuthn assertion step. The passkey verification...

EUVD-2026-72784

XenForo before 2.3.13 contains a multi-factor authentication bypass vulnerability in the passkey TFA provider that allows an authenticated attacker to complete login as another user by submitting their own registered passkey credential during the WebAuthn assertion step. The passkey verification...

CVE-2026-73312 XenForo < 2.3.13 Refresh Token Replay via Expired Access Token

XenForo before 2.3.13 contains a refresh token replay vulnerability that allows attackers to reuse a refresh token multiple times by exploiting the failure to mark tokens as consumed when the parent access token has expired. Attackers can repeatedly submit the same refresh token to generate...

EUVD-2026-72783

XenForo before 2.3.13 contains a refresh token replay vulnerability that allows attackers to reuse a refresh token multiple times by exploiting the failure to mark tokens as consumed when the parent access token has expired. Attackers can repeatedly submit the same refresh token to generate...

CVE-2026-73312

XenForo versions before 2.3.13 contain a refresh token replay vulnerability in the authentication token mechanism. The root cause is the failure to mark refresh tokens as consumed when the parent access token has expired, allowing an attacker to repeatedly submit the same refresh token to generat...

CVE-2026-73312 XenForo < 2.3.13 Refresh Token Replay via Expired Access Token

XenForo before 2.3.13 contains a refresh token replay vulnerability that allows attackers to reuse a refresh token multiple times by exploiting the failure to mark tokens as consumed when the parent access token has expired. Attackers can repeatedly submit the same refresh token to generate...

CVE-2026-73311 XenForo < 2.3.13 OAuth2 Authorization Code Reuse

XenForo before 2.3.13 contains an OAuth2 authorization code reuse vulnerability that allows attackers to obtain unauthorized token pairs by submitting a previously used authorization code. Attackers can exploit the failure to invalidate or mark authorization codes as consumed after initial token...

EUVD-2026-72782

XenForo before 2.3.13 contains an OAuth2 authorization code reuse vulnerability that allows attackers to obtain unauthorized token pairs by submitting a previously used authorization code. Attackers can exploit the failure to invalidate or mark authorization codes as consumed after initial token...

CVE-2026-73311

XenForo before 2.3.13 is affected by an OAuth2 authorization code reuse vulnerability. The root cause is a failure to invalidate or mark authorization codes as consumed after initial token issuance, allowing an attacker to resubmit a previously used authorization code and obtain an independent to...

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 by submitting a different allowlisted URI than the one recorded at authorization time. Attackers can exchange an...

CVE-2026-73310

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 then exchange an int...

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 by submitting a different allowlisted URI than the one recorded at authorization time. Attackers can exchange an...

EUVD-2026-72781

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...

CVE-2026-73309 XenForo < 2.3.13 Authentication Bypass via OAuth2 Token Endpoint

XenForo before 2.3.13 contains an authentication bypass vulnerability in the OAuth2 token endpoint that allows unauthenticated attackers to obtain valid token pairs by submitting empty values for clientsecret and codeverifier parameters. Attackers can exploit PHP truthy evaluation logic, which...

CVE-2026-73309

XenForo before 2.3.13 is vulnerable to an authentication bypass in its OAuth2 token endpoint . An unauthenticated attacker can submit empty strings for the client_secret and code_verifier parameters; because PHP truthy evaluation treats empty strings as falsy, both the client secret check and the...

EUVD-2026-72780

XenForo before 2.3.13 contains an authentication bypass vulnerability in the OAuth2 token endpoint that allows unauthenticated attackers to obtain valid token pairs by submitting empty values for clientsecret and codeverifier parameters. Attackers can exploit PHP truthy evaluation logic, which...

CVE-2026-51833

Xenforo 2.3.8 is vulnerable to SSRF. Attackers that have administrator privileges or are able to add/save RSS feeds can enumerate internal services ports or expose the original IP address of the server...

CVE-2026-51833

XenForo 2.3.8 is affected by an SSRF vulnerability. If an attacker has administrator privileges or can add/save RSS feeds, they can enumerate internal services (ports) or reveal the server’s original IP address. The available sources confirm the vulnerability and its impact, but no remediation de...

CVE-2026-51833

Xenforo 2.3.8 is vulnerable to SSRF. Attackers that have administrator privileges or are able to add/save RSS feeds can enumerate internal services ports or expose the original IP address of the server...