What is CVE-2018-5403?

CVE-2018-5403 is a high-severity vulnerability in Imperva Securesphere, classified under Command Injection. CVSS score: 8.1/10. Published 2019-01-10.

How severe is CVE-2018-5403?

High severity. CVSS v3 base score is 8.1 out of 10.

RCE in Imperva Securesphere

CVE-2018-5403

Imperva SecureSphere gateway (GW) running v13, for both pre-First Time Login or post-First Time Login (FTL), if the attacker knows the basic authentication passwords, the GW may be vulnerable to RCE through specially crafted requests, from the web access management interface.

Vulnerability class: Command Injection (OS Command Injection)

Published 2019-01-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.024 (83.5th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 83rd percentile — 83.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.024 · newest: 0.024 · change: 0.000

Affected products

Imperva Securesphere — versions 13.1.10, 13.0, 13.0.10

Weakness classification (CWE)

References

www.exploit-db.com/exploits/45542 (Exploit, VDB Entry, Third Party Advisory, exploit)

Frequently asked questions

What is CVE-2018-5403?: CVE-2018-5403 is a high-severity vulnerability in Imperva Securesphere, classified under Command Injection. CVSS score: 8.1/10. Published 2019-01-10.
How severe is CVE-2018-5403?: High severity. CVSS v3 base score is 8.1 out of 10.