🛡️ CVE-2023-50714
🟡 CVSS 6.8 — Medium ⚠️ Exploit Public CWE-347 NVD
6.8
CVSS Score
0 Low4 Medium7 High9 Critical10

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.

Details

Severity MEDIUM
CVSS Score 6.8
CVSS Vector CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
CWE CWE-347
Public Exploit ⚠️ Yes
Source NVD
Published 2023-12-22
Updated 2026-06-08
Modified 2024-11-21

Affected Packages

Software From version Fixed in
yii2-authclient — 2.2.15
yiisoft/yii2-authclient — 2.2.15

References

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