Medium severity · published Oct 30, 2025
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
6.1
CVSS
0.8%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 56% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NX
Nagios XI · Nagios
before 2024; 2024; 2024; 2024; 2024 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-13993
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-13993
Release Notes
https://www.nagios.com/changelog/nagios-xi/
Vendor Advisory
https://www.nagios.com/products/security/#nagios-xi
Third Party Advisory
https://www.vulncheck.com/advisories/nagios-xi-reflected-xss-via-login-page-on-older-browsers
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CVE-2024-13994
Nagios XI versions prior to 2024R1.1.2 contain a missing authorization control when the 'Allow Insecure Logins' option is enabled. Under this configuration, any user can create…