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CVE-2023-47400 is a high-severity remote code execution vulnerability in the Nagios XI Custom Includes feature affecting Nagios XI v5.11.1. According to the provided context, the protection model for Custom Includes could be bypassed by overwriting or removing the .htaccess file that was intended to prevent execution of uploaded content, and then uploading a PHP payload disguised with an allowed filename or extension pattern such as "exploit.jpg.php". Once the uploaded file was reachable over the web interface, the attacker could request it directly and cause the embedded PHP code to execute on the Nagios XI server. The issue is therefore an unrestricted or insufficiently restricted file upload condition combined with ineffective server-side execution controls in the upload location.
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No public exploit code observed for this vulnerability.
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A high-severity remote code execution vulnerability in Nagios XI's Custom Includes feature that allows administrators to bypass upload protections and execute arbitrary PHP code.
A high-severity remote code execution vulnerability in Nagios XI's Custom Includes feature that allows an administrator to bypass upload protections, overwrite .htaccess, upload PHP code, and execute it on the server.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
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