How severe is CVE-2021-28924?

CVE-2021-28924 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.

Is CVE-2021-28924 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-28924?

CVE-2021-28924 affects Nagios Network Analyzer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-28924?

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

When was CVE-2021-28924 published?

CVE-2021-28924 was published on 2021-04-08 and last updated on 2026-06-17.

CVE-2021-28924

CVE-2021-28924 is a medium-severity vulnerability in Nagios Network Analyzer with a CVSS 3.x base score of 6.1. 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 6.1)
CVSS v2: 4.3
EPSS exploit prediction: 9% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-79
Affected product: Nagios Network Analyzer
Published: 2021-04-08
Last modified: 2026-06-17

Description

Self Authenticated XSS in Nagios Network Analyzer before 2.4.2 via the nagiosna/groups/queries page.

Frequently asked questions

What is CVE-2021-28924?: Self Authenticated XSS in Nagios Network Analyzer before 2.4.2 via the nagiosna/groups/queries page.
How severe is CVE-2021-28924?: CVE-2021-28924 has a CVSS 3.x base score of 6.1, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability none.
Is CVE-2021-28924 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28924?: CVE-2021-28924 affects Nagios Network Analyzer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-28924?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-28924 published?: CVE-2021-28924 was published on 2021-04-08 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:nagios:network_analyzer:*:*:*:*:*:*:*:*

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