What’s Vulnerable › Vulnerabilities

CVE-2023-47130: Unsafe deserialization of user data in yiisoft/yii

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-11-14 · updated 2026-06-17
• Weakness: CWE-502

Description

Yii is an open source PHP web framework. yiisoft/yii before version 1.1.29 are vulnerable to Remote Code Execution (RCE) if the application calls `unserialize()` on arbitrary user input. An attacker may leverage this vulnerability to compromise the host system. A fix has been developed for the 1.1.29 release. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Affected products

• yiisoft yii: before 1.1.29 — fixed in 1.1.29

How to fix

Upgrade to a fixed version: yiisoft yii 1.1.29. Check the vendor advisory for mitigations.

References

• https://github.com/yiisoft/yii/commit/37142be4dc5831114a375392e86d6450d4951c06
• https://github.com/yiisoft/yii/security/advisories/GHSA-mw2w-2hj2-fg8q
• https://owasp.org/www-community/vulnerabilities/PHP_Object_Injection
• https://github.com/yiisoft/yii/commit/37142be4dc5831114a375392e86d6450d4951c06
• https://github.com/yiisoft/yii/security/advisories/GHSA-mw2w-2hj2-fg8q
• https://owasp.org/www-community/vulnerabilities/PHP_Object_Injection

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