CVE-2018-20745 Information

Description

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.

CVSS Vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Reference

https://github.com/yiisoft/yii2/issues/16193 https://www.usenix.org/system/files/conference/usenixsecurity18/sec18-chen.pdf

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

HIGH

Base Score

NONE

Base Severity

5.9