Use of Predictable Algorithm in Random Number Generator in yiisoft/yii2
Priority LOW 37CWE-1241Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub.
Summary
yii2 is vulnerable to Use of Predictable Algorithm in Random Number Generator
Why it matters now
EPSS 0.01902 79th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed yiisoft/yii2-dev (Packagist): 2.0.43
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Yiiframework | yiisoft/yii2 | up to 2.0.42.1 | — | No fix listed | CNA |
| — | yiisoft/yii2-dev (Packagist) | before 2.0.43 | 2.0.43 | Patch available | GHSA-hq3v-rg6f-6hx4 |
- yiisoft/yii2 VendorYiiframework Affected up to 2.0.42.1 Fixed in — No fix listed CNA
- yiisoft/yii2-dev (Packagist) Vendor— Affected before 2.0.43 Fixed in 2.0.43 Patch available GHSA-hq3v-rg6f-6hx4
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:yiiframework:yii:*:*:*:*:*:*:*:* | 2.0.0 to before 2.0.43 | Vulnerable | Yiiframework |
- cpe:2.3:a:yiiframework:yii:*:*:*:*:*:*:*:* Versions 2.0.0 to before 2.0.43 Vulnerable ·Yiiframework
Remediation
- Fix · GHSA-hq3v-rg6f-6hx4 yiisoft/yii2-dev (Packagist) Fixed in 2.0.43 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2021-3689
- 2026-10-03 Alias added: GHSA-hq3v-rg6f-6hx4
References
More Yiiframework Yii vulnerabilities
- TI-2024-38344 Yii 2 before 2.0.52 mishandles the attaching of behavior that is defined by an __class… KEVCVSS 3.1CRITICAL 9.8
- TI-2020-11920 Unsafe deserialization in Yii 2 CVSS 3.1CRITICAL 10.0
- TI-2024-04634 Unsafe Reflection in base Component class in yiisoft/yii2 CVSS 3.1CRITICAL 9.1
- TI-2025-02355 yiisoft Yii2 MockClass.php generate deserialization CVSS 4.0MEDIUM 5.3
- TI-2025-02354 yiisoft Yii2 SortableIterator.php getIterator deserialization CVSS 4.0MEDIUM 5.3
- TI-2023-11755 SQL injection vulnerability found in Yii Framework Yii 2 Framework before v.2.0.47 allows… CVSS 3.1CRITICAL 9.8
Sources
- CVE-2021-3689 · CVE Program
- CVE-2021-3689 · NVD
- FIRST EPSS
- GHSA-hq3v-rg6f-6hx4 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences