What’s Vulnerable › Vulnerabilities

CVE-2022-41922: yiisoft/yii before v1.1.27 vulnerable to Remote Code Execution if the application calls `unserialize()` on arbitrary user input

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-11-23 · updated 2026-06-17
• Weakness: CWE-502

Description

`yiisoft/yii` before version 1.1.27 are vulnerable to Remote Code Execution (RCE) if the application calls `unserialize()` on arbitrary user input. This has been patched in 1.1.27.

Affected products

• yiisoft yii: before 1.1.27 — fixed in 1.1.27

How to fix

Upgrade to a fixed version: yiisoft yii 1.1.27. Check the vendor advisory for mitigations.

References

• https://github.com/yiisoft/yii/commit/ed67b7cc57216557c5c595c6650cdd2d3aa41c52
• https://github.com/yiisoft/yii/security/advisories/GHSA-442f-wcwq-fpcf
• https://github.com/yiisoft/yii/commit/ed67b7cc57216557c5c595c6650cdd2d3aa41c52
• https://github.com/yiisoft/yii/security/advisories/GHSA-442f-wcwq-fpcf

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