How severe is CVE-2023-50714?

CVE-2023-50714 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.

Is CVE-2023-50714 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-50714?

CVE-2023-50714 affects Yiiframework Yii2-authclient. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-50714?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2023-50714 published?

CVE-2023-50714 was published on 2023-12-22 and last updated on 2026-06-17.

CVE-2023-50714

CVE-2023-50714 is a medium-severity vulnerability in Yiiframework Yii2-authclient with a CVSS 3.x base score of 6.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: Medium (CVSS 3.x base score 6.8)
EPSS exploit prediction: 0% (40th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Yiiframework Yii2-authclient
Published: 2023-12-22
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2023-50714?: 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.
How severe is CVE-2023-50714?: CVE-2023-50714 has a CVSS 3.x base score of 6.8, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2023-50714 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-50714?: CVE-2023-50714 affects Yiiframework Yii2-authclient. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-50714?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2023-50714 published?: CVE-2023-50714 was published on 2023-12-22 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:yiiframework:yii2-authclient:*:*:*:*:*:*:*:*

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