CVE-2021-45468 is a critical vulnerability affecting Imperva Web Application Firewalls (WAF) released before December 23, 2021. It allows remote, unauthenticated attackers to bypass WAF security controls by using "Content-Encoding: gzip" in HTTP POST requests, enabling the delivery of malicious payloads to protected web servers. With a CVSS score of 9.8 (Critical), this vulnerability has a low attack complexity and can lead to complete compromise of confidentiality, integrity, and availability. While no public exploit code or active exploitation has been observed, its high EPSS and FAUCET Risk Score indicate a significant potential for future exploitation.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 2021-12-23CPE matchmatch criteria | cpe:2.3:a:imperva:web_application_firewall:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.