CVE-2023-50714
Medium
Description
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 `authState`). Second, there is a risk for a `downgrade attack` if PKCE is being relied on for CSRF protection. Version 2.2.15 contains a patch for the issue. No known workarounds are available.
SeverityMedium
CVSS6.8
Exploit probability—
ProductYiiframework Yii2-authclient
PublishedDec 22, 2023
First seenDec 22, 2023
How to fix
Update
- yiiframework yii2-authclient2.2.15 or later
- yiisoft/yii2-authclient2.2.15 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| yiiframework yii2-authclient | v < 2.2.15 | 2.2.15 |
| yiisoft/yii2-authclientPackagist | v < 2.2.15 | 2.2.15 |
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