{"id":"CVE-2023-50708","aliases":["EUVD-2023-3310","GHSA-w8vh-p74j-x9xp"],"status":"published","title":"yii2-authclient vulnerable to possible timing attack on string comparison in OAuth1, OAuth2 and OpenID Connect implementation","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 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-\u003egetSecurity()-\u003ecompareString()`). Version 2.2.15 contains a patch for the issue. No known workarounds are available.","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00716,"percentile":0.54054,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-203"],"published":"2023-12-18T20:01:00Z","modified":"2026-10-28T02:30:46Z","fixes":[{"ecosystem":"Packagist","package":"yiisoft/yii2-authclient","fixed_in":["2.2.15"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"yiisoft/yii2-authclient","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2.2.14"},{"fixed":"2.2.15"}]}]},{"source":"osv","ecosystem":"Packagist","package":"yiisoft/yii2-authclient","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.15"}]}],"versions":["2.0.0","2.0.0-beta","2.0.0-rc","2.0.1","2.0.2","2.0.3","2.0.4","2.0.5","2.0.6","2.1.0","2.1.1","2.1.2","2.1.3","2.1.4","2.1.5","2.1.6","2.1.7","2.1.8","2.2.0","2.2.1","2.2.10","2.2.11","2.2.12","2.2.13","2.2.14","2.2.2","2.2.3","2.2.4","2.2.5","2.2.6","2.2.7","2.2.8","2.2.9"]}],"products":[{"vendor":"yiiframework","product":"yii2-authclient"},{"vendor":"yiisoft","product":"yii2-authclient"}],"references":[{"url":"https://github.com/yiisoft/yii2-authclient/security/advisories/GHSA-w8vh-p74j-x9xp","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Patch","Third Party Advisory","advisory","web"]},{"url":"https://github.com/yiisoft/yii2-authclient/commit/dabddf2154ab7e7703740205a069202554089248","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Patch","fix","web"]},{"url":"https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth1.php#L158","tags":["x_refsource_MISC","x_transferred","Product","web"]},{"url":"https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth2.php#L121","tags":["x_refsource_MISC","x_transferred","Product","web"]},{"url":"https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OpenIdConnect.php#L420","tags":["x_refsource_MISC","x_transferred","Product","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-50708","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-w8vh-p74j-x9xp"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/50xxx/CVE-2023-50708.json","tags":["advisory"]},{"url":"https://github.com/yiisoft/yii2-authclient","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2023-50708","title":"yii2-authclient vulnerable to possible timing attack on string comparison in OAuth1, OAuth2 and OpenID Connect implementation","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 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-\u003egetSecurity()-\u003ecompareString()`). Version 2.2.15 contains a patch for the issue. No known workarounds are available.","status":"published","published":"2023-12-22T18:25:01.925Z","modified":"2024-08-02T22:16:47.124Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-203"],"updated_at":"2026-11-02T14:35:34.55015Z"}],"euvd":[{"id":"EUVD-2023-3310","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 Oauth1/2 `state` and OpenID Connect `nonce` is vulnerable for a `timing attack` since it is compared via regular string comparison (instead of `Yii::$app-\u003egetSecurity()-\u003ecompareString()`). Version 2.2.15 contains a patch for the issue. No known workarounds are available.","status":"published","published":"2023-12-22T18:25:01Z","modified":"2024-08-02T22:16:47Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N","level":"medium"}],"updated_at":"2026-11-03T03:26:07.661682Z"}],"ghsa":[{"id":"GHSA-w8vh-p74j-x9xp","title":"yii2-authclient vulnerable to possible timing attack on string comparison in OAuth1, OAuth2 and OpenID Connect implementation","description":"### Impact\n_What kind of vulnerability is it? Who is impacted?_\n\nOriginal Report:\n\n\u003e The Oauth1/2 \"state\" and OpenID Connect \"nonce\" is vulnerable for a \"timing attack\" since it's compared via regular string \n\u003e comparison (instead of `Yii::$app-\u003egetSecurity()-\u003ecompareString()`).\n\nAffected Code:\n\n1. OAuth 1 \"state\"\n\n    https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth1.php#L158\n\n3. OAuth 2 \"state\"\n    \n    https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth2.php#L121\n\n4. OpenID Connect \"nonce\"\n    \n    https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OpenIdConnect.php#L420\n\n\n### Patches\n_Has the problem been patched? What versions should users upgrade to?_\n\nTBD: Replace strcmp with  `Yii::$app-\u003egetSecurity()-\u003ecompareString()`).\n\n### Workarounds\n_Is there a way for users to fix or remediate the vulnerability without upgrading?_\n\nnot as far as I see.\n\n### References\n_Are there any links users can visit to find out more?_\n","status":"published","published":"2023-12-18T20:01:00Z","modified":"2023-12-22T22:23:53Z","cvss":[{"version":"3.1","score":0,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:N","level":"none"}],"cwes":["CWE-203"],"updated_at":"2026-11-02T14:37:28.04129Z"}],"nvd":[{"id":"CVE-2023-50708","description":"yii2-authclient is an extension that adds OpenID, OAuth, OAuth2 and OpenId Connect consumers for the Yii framework 2.0. In yii2-authclient prior to version 2.2.15, the Oauth1/2 `state` and OpenID Connect `nonce` is vulnerable for a `timing attack` since it is compared via regular string comparison (instead of `Yii::$app-\u003egetSecurity()-\u003ecompareString()`). Version 2.2.15 contains a patch for the issue. No known workarounds are available.","status":"published","published":"2023-12-22T19:15:08.84Z","modified":"2026-06-17T06:39:49.53Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-203"],"updated_at":"2026-11-02T14:08:57.117371Z"}],"osv":[{"id":"CVE-2023-50708","title":"yii2-authclient vulnerable to possible timing attack on string comparison in OAuth1, OAuth2 and OpenID Connect implementation","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 Oauth1/2 `state` and OpenID Connect `nonce` is vulnerable for a `timing attack` since it is compared via regular string comparison (instead of `Yii::$app-\u003egetSecurity()-\u003ecompareString()`). Version 2.2.15 contains a patch for the issue. No known workarounds are available.","status":"published","published":"2023-12-22T18:25:01.925Z","modified":"2026-10-28T02:30:46.72781412Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:H/A:N","level":"medium"}],"cwes":["CWE-203"],"updated_at":"2026-11-02T15:44:35.245372Z"},{"id":"GHSA-w8vh-p74j-x9xp","title":"yii2-authclient vulnerable to possible timing attack on string comparison in OAuth1, OAuth2 and OpenID Connect implementation","description":"### Impact\n_What kind of vulnerability is it? Who is impacted?_\n\nOriginal Report:\n\n\u003e The Oauth1/2 \"state\" and OpenID Connect \"nonce\" is vulnerable for a \"timing attack\" since it's compared via regular string \n\u003e comparison (instead of `Yii::$app-\u003egetSecurity()-\u003ecompareString()`).\n\nAffected Code:\n\n1. OAuth 1 \"state\"\n\n    https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth1.php#L158\n\n3. OAuth 2 \"state\"\n    \n    https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OAuth2.php#L121\n\n4. OpenID Connect \"nonce\"\n    \n    https://github.com/yiisoft/yii2-authclient/blob/0d1c3880f4d79e20aa1d77c012650b54e69695ff/src/OpenIdConnect.php#L420\n\n\n### Patches\n_Has the problem been patched? What versions should users upgrade to?_\n\nTBD: Replace strcmp with  `Yii::$app-\u003egetSecurity()-\u003ecompareString()`).\n\n### Workarounds\n_Is there a way for users to fix or remediate the vulnerability without upgrading?_\n\nnot as far as I see.\n\n### References\n_Are there any links users can visit to find out more?_\n","status":"published","published":"2023-12-18T20:01:00Z","modified":"2026-09-10T03:50:09.190895282Z","cvss":[{"version":"3.1","score":0,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:N","level":"none"}],"cwes":["CWE-203"],"updated_at":"2026-11-02T15:46:58.401149Z"}]}}