Is CVE-2021-3523 in the CISA KEV catalog?

No. CVE-2021-3523 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3523?

CVE-2021-3523 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-3523?

CVE-2021-3523 has an EPSS score of 0.79% (52th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3523?

Upgrade apicast to 2.11.0 or later.

CVE & CISA-KEV Catalog

CVE-2021-3523

HIGH

7.5

CVSS v3

NVD

Description

A flaw was found in 3Scale APICast in versions prior to 2.11.0, where it incorrectly identified connections for reuse. This flaw allows an attacker to bypass security restrictions for an API request when hosting multiple APIs on the same IP address.

CWE-281

How to fix

Remediation Available

apicastNVD

Affected:< 2.11.0Fixed in:2.11.0CVE-2021-3523derived 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

0.79%probability of exploitation in 30 days

52ndpercentile

Moderate risk: more likely to be exploited than 52% of all known CVEs.

References

Vendor Advisory1

bugzilla.redhat.com

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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.