CVE-2024-13993 Nagios XI < 2024R1.1.2 Reflected XSS via Login Page on Older Browsers
Attackers can execute arbitrary JavaScript in victims' browsers via crafted links on the Nagios XI login page, potentially leading to session hijacking.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2024-13993?
CVE-2024-13993 is a medium-severity cross-site scripting vulnerability in Nagios Nagios Xi, published on 30 Oct 2025. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-79
Which versions are affected by CVE-2024-13993?
It affects 1 product.
Products include Nagios Nagios Xi.
How do I fix CVE-2024-13993?
No fix has been published for CVE-2024-13993 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2024-13993 being exploited?
There is no known exploitation of CVE-2024-13993 in the wild and no public exploit code.
Other vulnerabilities in Nagios Nagios Xi
Sources
Also known as GHSA-f59v-q7cp-mw78.