{"id":"CVE-2018-20745","details":"Yii 2.x through 2.0.15.1 actively converts a wildcard CORS policy into reflecting an arbitrary Origin header value, which is incompatible with the CORS security design, and could lead to CORS misconfiguration security problems.","aliases":["GHSA-cr6r-6xm9-ww22"],"modified":"2026-08-07T16:50:40.339135Z","published":"2019-01-28T08:29:00.527Z","references":[{"type":"ADVISORY","url":"https://www.usenix.org/system/files/conference/usenixsecurity18/sec18-chen.pdf"},{"type":"REPORT","url":"https://github.com/yiisoft/yii2/issues/16193"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/yiisoft/yii2","events":[{"introduced":"ae8d9782707b89315194ec70a139fece122b8977"},{"last_affected":"20aa5080189cbacd4180d3b115752817921eb364"}],"database_specific":{"cpe":"cpe:2.3:a:yiiframework:yii:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"2.0"},{"last_affected":"2.0.15.1"}],"source":"CPE_RANGE"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20745.json"}}],"schema_version":"1.8.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"}]}