CVE-2020-15148: Yiiframework Yii

Critical severity, CVSS 10.0. EPSS: 77.5% chance of exploitation in the next 30 days.

Yii 2 (yiisoft/yii2) before version 2.0.38 is vulnerable to remote code execution if the application calls `unserialize()` on arbitrary user input. This is fixed in version 2.0.38. A possible workaround without upgrading is available in the linked advisory.

Affected products

• Yiiframework Yii: before 2.0.38 (fixed in 2.0.38)

Published 2020-09-15. Last modified 2026-06-17.