How severe is CVE-2021-27676?

CVE-2021-27676 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-27676 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27676?

CVE-2021-27676 affects Centreon. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-27676?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-27676 published?

CVE-2021-27676 was published on 2021-05-26 and last updated on 2026-07-05.

CVE-2021-27676

CVE-2021-27676 is a medium-severity vulnerability in Centreon with a CVSS 3.x base score of 5.4. 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-79.

Key facts

Severity: Medium (CVSS 3.x base score 5.4)
CVSS v2: 3.5
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Centreon
Published: 2021-05-26
Last modified: 2026-07-05

Description

Centreon version 20.10.2 is affected by a cross-site scripting (XSS) vulnerability. The dep_description (Dependency Description) and dep_name (Dependency Name) parameters are vulnerable to stored XSS. A user has to log in and go to the Configuration > Notifications > Hosts page.

Frequently asked questions

What is CVE-2021-27676?: Centreon version 20.10.2 is affected by a cross-site scripting (XSS) vulnerability. The dep_description (Dependency Description) and dep_name (Dependency Name) parameters are vulnerable to stored XSS. A user has to log in and go to the Configuration > Notifications > Hosts page.
How severe is CVE-2021-27676?: CVE-2021-27676 has a CVSS 3.x base score of 5.4, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-27676 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27676?: CVE-2021-27676 affects Centreon. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-27676?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-27676 published?: CVE-2021-27676 was published on 2021-05-26 and last updated on 2026-07-05.

References

Affected products (1)

cpe:2.3:a:centreon:centreon:20.10.2:*:*:*:*:*:*:*

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