CVE-2018-5403

Exp

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.

Published: 2019-01-10 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2018-5403 is rated High Exploit Risk (76.2/100): CVSS High severity, with medium exploitation likelihood (EPSS 4.67%). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2018-5403

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2018-5403

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 6.79% 4.67% -2.12%
2 2025-03-29 4.67% 6.79% +2.12%
3 2025-03-17 — 4.67% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2018-5403

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.1 3.0 HIGH
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 2.2 5.9 [email protected]
6.8 2.0 MEDIUM
AV:N/AC:M/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 8.6 6.4 [email protected]

Weakness enumeration for CVE-2018-5403

Affected software / configurations for CVE-2018-5403

Vendor Product Version Raw CPE
imperva securesphere 13.0.10 cpe:2.3:a:imperva:securesphere:13.0.10:*:*:*:*:*:*:*
imperva securesphere 13.1.10 cpe:2.3:a:imperva:securesphere:13.1.10:*:*:*:*:*:*:*
imperva securesphere 13.2.10 cpe:2.3:a:imperva:securesphere:13.2.10:*:*:*:*:*:*:*

References for CVE-2018-5403

URL Tags
https://www.exploit-db.com/exploits/45542 Exploit Third Party Advisory VDB Entry
cvelogic Threat Intelligence