How severe is CVE-2021-47696?

CVE-2021-47696 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-2021-47696 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-47696?

CVE-2021-47696 affects Nagios Nagios Xi. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-47696?

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

Does CVE-2021-47696 have an EU (EUVD) identifier?

Yes. CVE-2021-47696 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-34703.

When was CVE-2021-47696 published?

CVE-2021-47696 was published on 2025-10-30 and last updated on 2026-06-17.

CVE-2021-47696

CVE-2021-47696 is a medium-severity vulnerability in Nagios Nagios Xi 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 v4: 5.1
EPSS exploit prediction: 0% (33rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2021-34703
Weakness: CWE-79
Affected product: Nagios Nagios Xi
Published: 2025-10-30
Last modified: 2026-06-17

Description

Nagios XI versions prior to 5.8.0 are vulnerable to cross-site scripting (XSS) via BPI config ID handling. Insufficient validation or escaping of user-supplied input may allow an attacker to inject and execute arbitrary script in the context of a victim's browser.

Frequently asked questions

What is CVE-2021-47696?: Nagios XI versions prior to 5.8.0 are vulnerable to cross-site scripting (XSS) via BPI config ID handling. Insufficient validation or escaping of user-supplied input may allow an attacker to inject and execute arbitrary script in the context of a victim's browser.
How severe is CVE-2021-47696?: CVE-2021-47696 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-2021-47696 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (33rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-47696?: CVE-2021-47696 affects Nagios Nagios Xi. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-47696?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2021-47696 have an EU (EUVD) identifier?: Yes. CVE-2021-47696 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2021-34703.
When was CVE-2021-47696 published?: CVE-2021-47696 was published on 2025-10-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nagios:nagios_xi:*:*:*:*:*:*:*:*

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