CVE-2021-3689

Use of Predictable Algorithm in Random Number Generator in yiisoft/yii2

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Published Aug 10, 2021 CVSS 3.1 · 7.5 High EPSS 1.9% KEV · Not listed

Description

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

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

yiisoft

yiisoft/yii2

affected

Version	Status	Constraints
`unspecified`	affected	≤ 2.0.42.1

Configuration 1 [-]

cpe:2.3:a:yiiframework:yii:*:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source	ID	Title
EUVD	EUVD-2021-2074	yii2 is vulnerable to Use of Predictable Algorithm in Random Number Generator
Github GHSA	GHSA-hq3v-rg6f-6hx4	Use of Insufficiently Random Values in yiisoft/yii2-dev

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact High

Availability Impact None

User Interaction None

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact Partial

Availability Impact None

This CVE is not in the KEV list.

Exploit prediction score: 1.9% (1.902% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://github.com/yiisoft/yii2/commit/13f27e4d920a05d53236139e8b07007acd046a46
https://huntr.dev/bounties/50aad1d4-eb00-4573-b8a4-dbe38e2c229f

History

No history.

Subscriptions

Yiiframework Yii

Weaknesses

Sources

CVE record Updated: Aug 3, 2024, 5:01 PM

Status: PUBLISHED
Assigner: @huntrdev
Published: Aug 10, 2021, 10:21 AM
Updated: Aug 3, 2024, 5:01 PM
Reserved: Aug 7, 2021, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 4:05 AM

Status: Modified
Published: Aug 10, 2021, 11:15 AM
Modified: Jun 17, 2026, 4:05 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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