What is CVE-2018-21020?

CVE-2018-21020 is a high-severity vulnerability in Centreon Web, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2019-10-08.

How severe is CVE-2018-21020?

High severity. CVSS v3 base score is 7.5 out of 10.

Improper input validation in Centreon Web

CVE-2018-21020

In very rare cases, a PHP type juggling vulnerability in centreonAuth.class.php in Centreon Web before 2.8.27 allows attackers to bypass authentication mechanisms in place.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2019-10-08 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.020 (79.7th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 80th percentile — 79.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.020 · newest: 0.020 · change: 0.000

Affected products

Centreon Web

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

github.com/centreon/centreon/pull/7084 (Third Party Advisory)
www.openwall.com/lists/oss-security/2019/10/08/1 (Mailing List, Third Party Advisory)
www.openwall.com/lists/oss-security/2019/10/09/2 (mailing-list, Mailing List, Third Party Advisory)

Frequently asked questions

What is CVE-2018-21020?: CVE-2018-21020 is a high-severity vulnerability in Centreon Web, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2019-10-08.
How severe is CVE-2018-21020?: High severity. CVSS v3 base score is 7.5 out of 10.