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{
"id": "CVE-2023-50714",
"sourceIdentifier": "security-advisories@github.com",
"published": "2023-12-22T19:15:09.057",
"lastModified": "2023-12-22T20:32:25.167",
"vulnStatus": "Awaiting Analysis",
"descriptions": [
{
"lang": "en",
"value": "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."
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "security-advisories@github.com",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N",
"attackVector": "NETWORK",
"attackComplexity": "HIGH",
"privilegesRequired": "NONE",
"userInteraction": "REQUIRED",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"availabilityImpact": "NONE",
"baseScore": 6.8,
"baseSeverity": "MEDIUM"
},
"exploitabilityScore": 1.6,
"impactScore": 5.2
}
]
},
"weaknesses": [
{
"source": "security-advisories@github.com",
"type": "Secondary",
"description": [
{
"lang": "en",
"value": "CWE-347"
},
{
"lang": "en",
"value": "CWE-918"
}
]
}
],
"references": [
{
"url": "https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth1.php#L158",
"source": "security-advisories@github.com"
},
{
"url": "https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth2.php#L121",
"source": "security-advisories@github.com"
},
{
"url": "https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OpenIdConnect.php#L420",
"source": "security-advisories@github.com"
},
{
"url": "https://github.com/yiisoft/yii2-authclient/commit/721ed974bc44137437b0cdc8454e137fff8db213",
"source": "security-advisories@github.com"
},
{
"url": "https://github.com/yiisoft/yii2-authclient/security/advisories/GHSA-rw54-6826-c8j5",
"source": "security-advisories@github.com"
}
]
}