Description
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.
Published: 2026-08-12
Score: 5.1 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Fri, 14 Aug 2026 17:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:nagios:nagios_core:*:*:*:*:*:*:*:*
cpe:2.3:a:nagios:nagios_xi:*:*:*:*:*:*:*:*

Thu, 13 Aug 2026 10:15:00 +0000

Type Values Removed Values Added
First Time appeared Nagios
Nagios nagios Core
Nagios nagios Xi
Vendors & Products Nagios
Nagios nagios Core
Nagios nagios Xi

Wed, 12 Aug 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 12 Aug 2026 16:45:00 +0000

Type Values Removed Values Added
Description 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.
Title Nagios Core / XI DOM-based XSS via jsonquery.js
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'}


Subscriptions

Nagios Nagios Core Nagios Xi
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-08-14T16:49:59.849Z

Reserved: 2026-05-21T18:34:46.418Z

Link: CVE-2026-48552

cve-icon Vulnrichment

Updated: 2026-08-12T16:46:48.247Z

cve-icon NVD

Status : Received

Published: 2026-08-12T17:17:27.523

Modified: 2026-08-12T17:17:27.523

Link: CVE-2026-48552

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-13T09:48:19Z

Weaknesses