CVE-2021-45468
9.8
CRITICAL · CVSS 3.1 · EPSS 4% (pctl 90)
In your normal cycle
Critical by CVSS (9.8), but no sign of active exploitation.
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.
Scoring
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 3.99% — more likely to be exploited than 90% of all CVEs |
| Weakness | CWE-444 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2022-01-14 |
| Last modified | 2026-06-17 |
Affected (1)
| Vendor | Product |
|---|---|
| imperva | web application firewall |
References
→ the Explorer · watch your stack · NVD