Observable discrepancy in Yiiframework yii2-authclient
Priority MEDIUM 43CWE-203Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-203.
Summary
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 Oauth1/2 `state` and OpenID Connect `nonce` is vulnerable for a `timing attack` since it is compared via regular string comparison (instead of `Yii::$app->getSecurity()->compareString()`). Version 2.2.15 contains a patch for the issue. No known workarounds are available.
Why it matters now
EPSS 0.00716 54th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed yii2-authclient (yiisoft): 2.2.15yiisoft/yii2-authclient (Packagist): 2.2.15
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Yiiframework | yii2-authclient | before 2.2.15 | 2.2.15 | Patch available | CNA |
| — | yiisoft/yii2-authclient (Packagist) | before 2.2.15 | 2.2.15 | Patch available | GHSA-w8vh-p74j-x9xp |
- yii2-authclient VendorYiiframework Affected before 2.2.15 Fixed in 2.2.15 Patch available CNA
- yiisoft/yii2-authclient (Packagist) Vendor— Affected before 2.2.15 Fixed in 2.2.15 Patch available GHSA-w8vh-p74j-x9xp
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:yiiframework:yii2-authclient:*:*:*:*:*:*:*:* | before 2.2.15 | Vulnerable | Yiiframework |
- cpe:2.3:a:yiiframework:yii2-authclient:*:*:*:*:*:*:*:* Versions before 2.2.15 Vulnerable ·Yiiframework
Remediation
- Fix · CNA yii2-authclient (yiisoft) Fixed in 2.2.15
- Fix · GHSA-w8vh-p74j-x9xp yiisoft/yii2-authclient (Packagist) Fixed in 2.2.15 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2023-50708
- 2026-10-03 Alias added: GHSA-w8vh-p74j-x9xp
References
Other 4
- https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth1.php#L158
- https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth2.php#L121
- https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OpenIdConnect.php#L420
- https://github.com/yiisoft/yii2-authclient
More Yiiframework Yii2-authclient vulnerabilities
- TI-2023-27660 The Oauth2 PKCE implementation is vulnerable CVSS 3.1HIGH 8.8
Sources
- CVE-2023-50708 · CVE Program
- CVE-2023-50708 · NVD
- FIRST EPSS
- GHSA-w8vh-p74j-x9xp · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences