How severe is CVE-2018-21020?

CVE-2018-21020 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2018-21020 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-21020?

CVE-2018-21020 affects Centreon Centreon Web. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-21020?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-21020 published?

CVE-2018-21020 was published on 2019-10-08 and last updated on 2026-06-17.

CVE-2018-21020

CVE-2018-21020 is a high-severity vulnerability in Centreon Centreon Web with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Centreon Centreon Web
Published: 2019-10-08
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2018-21020?: CVE-2018-21020 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2018-21020 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-21020?: CVE-2018-21020 affects Centreon Centreon Web. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-21020?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-21020 published?: CVE-2018-21020 was published on 2019-10-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:centreon:centreon_web:*:*:*:*:*:*:*:*

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