What’s Vulnerable › Vulnerabilities

CVE-2018-20745

• Severity: medium (CVSS 5.9 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2019-01-28 · updated 2026-06-17
• Weakness: CWE-346

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.

Affected products

• yiisoft yii: from 2.0 through 2.0.15.1

References

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

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