How severe is CVE-2024-13993?

CVE-2024-13993 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-2024-13993 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-13993?

CVE-2024-13993 primarily affects Nagios Nagios Xi. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-13993?

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

Does CVE-2024-13993 have an EU (EUVD) identifier?

Yes. CVE-2024-13993 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-55048.

When was CVE-2024-13993 published?

CVE-2024-13993 was published on 2025-10-30 and last updated on 2026-06-17.

CVE-2024-13993

CVE-2024-13993 is a medium-severity vulnerability in Nagios Nagios Xi 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 v4: 5.1
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-55048
Weakness: CWE-79
Affected product: Nagios Nagios Xi
Published: 2025-10-30
Last modified: 2026-06-17

Description

Nagios XI versions prior to < 2024R1.1.2 are vulnerable to a reflected cross-site scripting (XSS) via the login page when accessed with older web browsers. Insufficient validation or escaping of user-supplied input reflected by the login page can allow an attacker to craft a malicious link that, when visited by a victim, executes arbitrary JavaScript in the victim’s browser within the Nagios XI origin. The issue is observable under legacy browser behaviors; modern browsers may mitigate some vectors.

Frequently asked questions

What is CVE-2024-13993?: Nagios XI versions prior to < 2024R1.1.2 are vulnerable to a reflected cross-site scripting (XSS) via the login page when accessed with older web browsers. Insufficient validation or escaping of user-supplied input reflected by the login page can allow an attacker to craft a malicious link that, when visited by a victim, executes arbitrary JavaScript in the victim’s browser within the Nagios XI origin. The issue is observable under legacy browser behaviors; modern browsers may mitigate some vectors.
How severe is CVE-2024-13993?: CVE-2024-13993 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-2024-13993 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-13993?: CVE-2024-13993 primarily affects Nagios Nagios Xi. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-13993?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-13993 have an EU (EUVD) identifier?: Yes. CVE-2024-13993 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-55048.
When was CVE-2024-13993 published?: CVE-2024-13993 was published on 2025-10-30 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:a:nagios:nagios_xi:*:*:*:*:*:*:*:*
cpe:2.3:a:nagios:nagios_xi:2024:r1:*:*:*:*:*:*
cpe:2.3:a:nagios:nagios_xi:2024:r1.0.1:*:*:*:*:*:*
cpe:2.3:a:nagios:nagios_xi:2024:r1.1:*:*:*:*:*:*
cpe:2.3:a:nagios:nagios_xi:2024:r1.1.1:*:*:*:*:*:*

More vulnerabilities in Nagios Nagios Xi

CVE-2024-14003 — Critical (CVSS 9.8): Nagios XI versions prior to 2024R1.2 are vulnerable to remote code execution (RCE) through its NRDP (Nagios Remote…
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