Cyber Resilience

CVE-2021-45468

CriticalPublic PoC

Published: 14 January 2022

Published
14 January 2022
Modified
21 November 2024
KEV Added
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Patch
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CVSS Score v3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.3328 97.0th percentile
Risk Priority 40 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-45468 is a critical-severity HTTP Request/Response Smuggling (CWE-444) vulnerability in Imperva Web Application Firewall. Its CVSS base score is 9.8 (Critical).

Operationally, ranked in the top 3.0% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

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(s)
CWE-444

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

imperva
web application firewall
≤ 2021-12-23

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References