Is CVE-2021-45468 in the CISA KEV catalog?

No. CVE-2021-45468 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-45468?

CVE-2021-45468 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2021-45468?

CVE-2021-45468 has an EPSS score of 3.99% (89th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-45468?

Upgrade web application firewall to 2021-12-23 or later.

CVE & CISA-KEV Catalog

CVE-2021-45468

CRITICALEPSS 89th pctl

9.8

CVSS v3

NVD

Description

Imperva Web Application Firewall (WAF) before 2021-12-23 allows remote unauthenticated attackers to use "Content-Encoding: gzip" to evade WAF security controls and send malicious HTTP POST requests to web servers behind the WAF.

CWE-444

How to fix

Remediation Available

web application firewallNVD

Affected:< 2021-12-23Fixed in:2021-12-23CVE-2021-45468derived 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

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

3.99%probability of exploitation in 30 days

89thpercentile

Elevated risk: more likely to be exploited than 89% of all known CVEs.

References

Exploit1

bishopfox.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.