CVE-2021-45468

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.

CVSS v3.1 NVD

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

CVSS v2.0 NVD

7.5 HIGHAV:N/AC:L/Au:N/C:P/I:P/A:P

EPSS

3.99% chance of exploitation in the next 30 days, 90th percentile

Published

2022-01-14

Updated

2024-08-04

Proof-of-concept exploits (1)

• 0xhaggis/Imperva_gzip_bypass6★ · 2021-12-21

Security advisories

• https://bishopfox.com/blog/imperva-eliminates-critical-exposure

References

• CVE Record
• NVD entry

Related

• CVE-2021-3036
• CVE-2021-3064
• CVE-2021-35211
• CVE-2021-44168
• CVE-2021-44186
• CVE-2022-42475