Nagios XI < 2011R1.9 XSS via backend_url JavaScript Link Handler
Published Oct 30, 2025
5.1
MEDIUMCVSS 4.0
EPSS 0.44%
Description
Nagios XI versions prior to 2011R1.9 are vulnerable to cross-site scripting (XSS) via the handling of the "backend_url" JavaScript link. Insufficient validation or escaping of user-supplied input may allow an attacker to inject and execute arbitrary script in the context of a victim's browser.
Affected products
-
- Version 0StatusaffectedConstraints<2011R1.9
- Version
- ≤ 2009
- 2011
- 2011
- 2011
- 2011
- 2011
- 2011
- 2011
- 2011
- 2011
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Vendor solution
Nagios addresses this vulnerability as "Fixed XSS vulnerabilty in backend_url javascript link."
Metrics
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
1 other source (NVD) ▾
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
NoTechnical Impact
PartialDecision
n/aAssessed Oct 31, 2025 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2025–2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.44% (0.00444) | 36.28th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.35% (0.00353) | 26.94th | v5 (v2026.06.15) |
| Oct 31, 2025 | 0.30% (0.00305) | 53.37th | v4 (v2025.03.14) |
References (2)
- https://www.nagios.com/changelog/nagios-xi/ release-notespatchRelease Notes
- https://www.vulncheck.com/advisories/nagios-xi-xss-via-backend-url-javascript-link-handler third-party-advisoryThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://www.nagios.com/changelog/nagios-xi/ | release-notespatchRelease Notes | |
| https://www.vulncheck.com/advisories/nagios-xi-xss-via-backend-url-javascript-link-handler | third-party-advisoryThird Party Advisory |
Change history (0)
No recorded changes yet.