CVE-2021-45468

CriticalCVSS 9.8/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-444

Affected software

No affected versions have been published.

Timeline

Published: Jan 14, 2022
Last modified: Jun 17, 2026
NVD status: Modified

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