How severe is CVE-2011-10039?

CVE-2011-10039 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-2011-10039 being actively exploited?

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

What products are affected by CVE-2011-10039?

CVE-2011-10039 primarily affects Nagios Nagios Xi. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-10039?

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

Does CVE-2011-10039 have an EU (EUVD) identifier?

Yes. CVE-2011-10039 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2011-5268.

When was CVE-2011-10039 published?

CVE-2011-10039 was published on 2025-10-30 and last updated on 2026-06-16.

CVE-2011-10039

CVE-2011-10039 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% (30th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2011-5268
Weakness: CWE-79
Affected product: Nagios Nagios Xi
Published: 2025-10-30
Last modified: 2026-06-16

Description

Nagios XI versions prior to 2011R1.9 are vulnerable to cross-site scripting (XSS) via the Alert Heatmap report and the “My Reports” listing of the web interface. 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-2011-10039?: Nagios XI versions prior to 2011R1.9 are vulnerable to cross-site scripting (XSS) via the Alert Heatmap report and the “My Reports” listing of the web interface. 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-2011-10039?: CVE-2011-10039 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-2011-10039 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-10039?: CVE-2011-10039 primarily affects Nagios Nagios Xi. In total, 10 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-10039?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2011-10039 have an EU (EUVD) identifier?: Yes. CVE-2011-10039 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2011-5268.
When was CVE-2011-10039 published?: CVE-2011-10039 was published on 2025-10-30 and last updated on 2026-06-16.

References

Affected products (10)

cpe:2.3:a:nagios:nagios_xi:*:*:*:*:*:*:*:*
cpe:2.3:a:nagios:nagios_xi:2011:r1:*:*:*:*:*:*
cpe:2.3:a:nagios:nagios_xi:2011:r1.1:*:*:*:*:*:*
cpe:2.3:a:nagios:nagios_xi:2011:r1.2:*:*:*:*:*:*
cpe:2.3:a:nagios:nagios_xi:2011:r1.3:*:*:*:*:*:*
cpe:2.3:a:nagios:nagios_xi:2011:r1.4:*:*:*:*:*:*
cpe:2.3:a:nagios:nagios_xi:2011:r1.5:*:*:*:*:*:*
cpe:2.3:a:nagios:nagios_xi:2011:r1.6:*:*:*:*:*:*
cpe:2.3:a:nagios:nagios_xi:2011:r1.7:*:*:*:*:*:*
cpe:2.3:a:nagios:nagios_xi:2011:r1.8:*:*:*:*:*:*

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