pfSense Plus < 26.07 / CE < 2.9.0 Stored XSS via status_monitoring.php
Published Sep 3, 2026
5.1
MEDIUMCVSS 4.0
EPSS 1.05%
Description
pfSense Plus before 26.07 and CE before 2.9.0 allow authenticated users with the Status: Monitoring privilege to inject arbitrary JavaScript via graph configuration parameters in /status_monitoring.php. Multiple POST parameters including graph-left, graph-right, time-period, resolution, start-date, end-date, start-time, end-time, graph-type, invert, and refresh-interval are concatenated and written to the global pfSense XML configuration without sanitization, then echoed unsanitized into a JavaScript string context on page render. Because the setting is stored in the global configuration, the payload executes in the browser of every user who visits the Status: Monitoring page.
Affected products
-
- Version 0StatusaffectedConstraints<2.9.0
- Version
-
- Version 0StatusaffectedConstraints<26.07
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Netgate | pfSense CE | affected |
| ||||||
| Netgate | pfSense Plus | unaffected |
|
No data.
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
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 Sep 5, 2026 · 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
Sep–Oct 2026- EPSS v5
Percentile over time
- EPSS v5
Table of values (2 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.05% (0.01052) | 63.05th | v5 (v2026.06.15) |
| Sep 4, 2026 | 0.37% (0.00371) | 30.19th | v5 (v2026.06.15) |
References (4)
- https://docs.netgate.com/downloads/pfSense-SA-26_09.packages.asc vendor-advisorypatch
- https://docs.netgate.com/pfsense/en/latest/releases/2-9-0.html release-notes
- https://docs.netgate.com/pfsense/en/latest/releases/26-07.html release-notes
- https://www.vulncheck.com/advisories/pfsense-plus-ce-stored-xss-via-status-monitoring-php third-party-advisory
| Link | Providers | Tags |
|---|---|---|
| https://docs.netgate.com/downloads/pfSense-SA-26_09.packages.asc | vendor-advisorypatch | |
| https://docs.netgate.com/pfsense/en/latest/releases/2-9-0.html | release-notes | |
| https://docs.netgate.com/pfsense/en/latest/releases/26-07.html | release-notes | |
| https://www.vulncheck.com/advisories/pfsense-plus-ce-stored-xss-via-status-monitoring-php | third-party-advisory |
Change history (0)
No recorded changes yet.