CVE-2021-3689
Use of Predictable Algorithm in Random Number Generator in yiisoft/yii2
HIGH
7.5
CVSS Score
Published: August 10, 2021 at 10:21 AM UTC
Updated: June 17, 2026 at 04:05 AM UTC
2 products affected across 2 vendorsYiiYii
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Severity
HIGH7.5
Exploit prediction
EPSS 2%
Description
yii2 is vulnerable to Use of Predictable Algorithm in Random Number Generator
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
2.0.0 ≤ v < 2.0.43
Affected range stops below 2.0.43, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
References (2)
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/yiisoft/yii2/commit/13f27e4d920a05d53236139e8b07007acd046a46x_refsource_CONFIRMExploitThird Party Advisory
Source: [email protected]
https://huntr.dev/bounties/50aad1d4-eb00-4573-b8a4-dbe38e2c229fCVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- HIGH
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-1241CWE-330
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