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:
- The
authCodeVerifiershould be removed after usage (similar to 'authState')- There is a risk for a "downgrade attack" if PKCE is being relied on for CSRF protection.
Patches
Has the problem been patched? What versions should users upgrade to?
2.2.15
Workarounds
Is there a way for users to fix or remediate the vulnerability without upgrading?
not known yet.
References
Are there any links users can visit to find out more?
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Composer package | yiisoft/yii2-authclient | < 2.2.15 | 2.2.15 |
References
- https://github.com/yiisoft/yii2-authclient/security/advisories/GHSA-rw54-6826-c8j5
- https://nvd.nist.gov/vuln/detail/CVE-2023-50714
- https://github.com/yiisoft/yii2-authclient/commit/721ed974bc44137437b0cdc8454e137fff8db213
- https://github.com/yiisoft/yii2-authclient
- 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
- CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N- Weakness (CWE)
CWE-287, CWE-347- Platform
- Composer
- Package
yiisoft/yii2-authclient- Disclosed
- 18.12.2023
- Updated
- 11.10.2026 10:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-rw54-6826-c8j5 - CC BY 4.0
Vulnerability history: yiisoft/yii2-authclient
All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 2
- First → latest
- 12.2023 12.2023
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Medium 1
- Low 1
Disclosures per year
- 2023: 2
- 2024: 0
- 2025: 0
- 2026: 0
-
yiisoft/yii2-authclient's Oauth2 PKCE implementation is vulnerable this entry
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