CVE-2026-48552
MediumCVSS 5.4Summary
Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 are vulnerable to DOM-based XSS in jsonquery.js, where unencoded JSON string values reflected from stored fields are inserted into the DOM without sanitization, allowing attackers to run arbitrary JavaScript in the victim's browser.
Risk Assessment
An attacker could exploit this to execute malicious scripts in the user's session, potentially leading to session hijacking or data theft.
Recommendation
Update Nagios Core to version 4.5.14 or later and Nagios XI to version 2026R1.7 or later, which include the fixes.
Original NVD description (English source)
Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 are vulnerable to DOM-based cross-site scripting in jsonquery.js. Unencoded JSON string values reflected from stored fields are inserted into the DOM without sanitization, allowing attackers to run arbitrary JavaScript in the victim's browser.