What is CVE-2018-5328?

CVE-2018-5328 is a critical-severity vulnerability in Beims Contractorweb.net, classified under Improper Authentication. CVSS score: 9.8/10. Published 2018-01-15.

How severe is CVE-2018-5328?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Beims Contractorweb.net

CVE-2018-5328

ZUUSE BEIMS ContractorWeb .NET 5.18.0.0 allows access to various /UserManagement/ privileged modules without authenticating the user; an attacker can misuse these functionalities to perform unauthorized actions, as demonstrated by Edit User Details.

Vulnerability class: Broken Authentication

Published 2018-01-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.013 (69.1th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000

Affected products

Beims Contractorweb.net — versions 5.18.0.0

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

becomepentester.blogspot.com/2018/01/ZUUSE-BEIMS-ContractorWeb-Privilege-Escala… (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2018-5328?: CVE-2018-5328 is a critical-severity vulnerability in Beims Contractorweb.net, classified under Improper Authentication. CVSS score: 9.8/10. Published 2018-01-15.
How severe is CVE-2018-5328?: Critical severity. CVSS v3 base score is 9.8 out of 10.