What’s Vulnerable › Vulnerabilities

CVE-2021-3692: Use of Predictable Algorithm in Random Number Generator in yiisoft/yii2

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-08-10 · updated 2026-06-17
• Weakness: CWE-1241

Description

yii2 is vulnerable to Use of Predictable Algorithm in Random Number Generator

Affected products

• yiisoft yii: from 2.0.0 before 2.0.43 — fixed in 2.0.43

How to fix

Upgrade to a fixed version: yiisoft yii 2.0.43. Check the vendor advisory for mitigations.

References

• https://github.com/yiisoft/yii2/commit/13f27e4d920a05d53236139e8b07007acd046a46
• https://huntr.dev/bounties/55517f19-5c28-4db2-8b00-f78f841e8aba
• https://github.com/yiisoft/yii2/commit/13f27e4d920a05d53236139e8b07007acd046a46
• https://huntr.dev/bounties/55517f19-5c28-4db2-8b00-f78f841e8aba

Get alerted when CVE-2021-3692 or the next vulnerability affects your stack