CVE-2023-50714 The Oauth2 PKCE implementation is vulnerable

yii2-authclient is an extension that adds OpenID, OAuth, OAuth2 and OpenId Connect consumers for the Yii framework 2.0. In yii2-authclient prior to version 2.2.15, the Oauth2 PKCE implementation is vulnerable in 2 ways. First, the authCodeVerifier should be removed after usage similar to authStat...

CVE-2023-50714 The Oauth2 PKCE implementation is vulnerable

yii2-authclient is an extension that adds OpenID, OAuth, OAuth2 and OpenId Connect consumers for the Yii framework 2.0. In yii2-authclient prior to version 2.2.15, the Oauth2 PKCE implementation is vulnerable in 2 ways. First, the authCodeVerifier should be removed after usage similar to authStat...

yiisoft/yii2-authclient's Oauth2 PKCE implementation is vulnerable

Impact What kind of vulnerability is it? Who is impacted? Original Report: The Oauth2 PKCE implementation is vulnerable in 2 ways: 1. The authCodeVerifier should be removed after usage similar to 'authState' 2. There is a risk for a "downgrade attack" if PKCE is being relied on for CSRF protectio...