Is CVE-2021-3689 in the CISA KEV catalog?

No. CVE-2021-3689 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3689?

CVE-2021-3689 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-3689?

CVE-2021-3689 has an EPSS score of 1.90% (77th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3689?

Upgrade yii to 2.0.43 or later.

CVE & CISA-KEV Catalog

CVE-2021-3689

HIGHEPSS 77th pctl

7.5

CVSS v3

NVD

Description

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

CWE-1241 CWE-330

How to fix

Remediation Available

yiiNVD

Affected:>= 2.0.0, < 2.0.43Fixed in:2.0.43CVE-2021-3689derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploit Intelligence

1.90%probability of exploitation in 30 days

77thpercentile

Elevated risk: more likely to be exploited than 77% of all known CVEs.

References

Patch1

github.com

Exploit1

huntr.dev

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.