CVE-2021-45468
Last modified
CVE-2021-45468 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 3.99% chance of exploitation in the next 30 days.
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/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Imperva | Web Application Firewall | < 2021-12-23 |
References
- https://bishopfox.com/blog/imperva-eliminates-critical-exposureExploit, Third Party Advisory
- https://bishopfox.com/blog/imperva-eliminates-critical-exposureExploit, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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