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Advisories

Nagios Core / XI CSRF via cmd.cgi Double-Submit Cookie

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severity
medium
date
Affecting

  • Nagios Core < 4.5.13

  • Nagios XI < 2026R1.5

CWE
  • CWE-352 Cross-Site Request Forgery (CSRF)
CVSS
6.9
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Credit
SeungMyung Lee
Description
Nagios Core before 4.5.13 and Nagios XI before 2026R1.5 contains a CSRF vulnerability in cmd.cgi. When no Cookie header is present, the double-submit cookie protection can be bypassed by supplying matching NagFormId and nagFormId values in the POST body, allowing a cross-site request to execute Nagios commands as a currently authenticated user.

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