CVE-2026-48550CWE-79cross-site-scripting

CVE-2026-48550

Medium · published August 12, 2026

CVSS v3.1
6.1
EPSS
0%
Percentile
37.1
In the wild
Unconfirmed
What it is

Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 are vulnerable to reflected cross-site scripting in cmd.cgi via the NagFormId parameter. An unauthenticated remote attacker can craft a malicious link that, when followed by an authenticated user, executes arbitrary JavaScript in the victim's browser.

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00438 · 37.1th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-08-12T21:17Z
References (3)
https://github.com/NagiosEnterprises/nagioscore/blob/master/Changelog · [email protected]https://www.nagios.com/security-disclosures/nagios-core/ · [email protected]https://www.vulncheck.com/advisories/nagios-core-xi-cmd-cgi-reflected-xss-via-nagformid-parameter · [email protected]
EPSS history
Timeline
  • 12 AUG 16:30Z
    Nagios Core / XI cmd.cgi Reflected XSS via NagFormId Parameter
    cvelistv5