EUVD-2026-70495
GHSA-2356-p4rp-xj6q
Severity by source
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
Requires low-privilege authentication and victim page-visit; scope change reflects cross-user JavaScript execution affecting admin browser sessions.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
2DescriptionCVE.org
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.
AnalysisAI
Stored XSS in pfSense Plus before 26.07 and pfSense CE before 2.9.0 allows an authenticated user holding only the Status: Monitoring privilege to inject arbitrary JavaScript via unsanitized graph configuration POST parameters in /status_monitoring.php. The payload is persisted in the global pfSense XML configuration file and rendered unsanitized into a JavaScript string context, meaning it executes automatically in the browser of every subsequent visitor to the Status: Monitoring page - including full administrators. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to hold a valid pfSense account with the Status: Monitoring privilege assigned - a scoped, non-default low-privilege role that grants access only to the monitoring dashboard. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 5.1 (AV:N/AC:L/AT:N/PR:L/UI:P/SC:L/SI:L) accurately reflects the limited direct system impact - the vulnerable system itself retains integrity - but the score understates the privilege-escalation potential via browser session hijacking. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to pfSense Plus 26.07 or pfSense CE 2.9.0, which contain the vendor-released patches per the Netgate release notes at https://docs.netgate.com/pfsense/en/latest/releases/26-07.html and https://docs.netgate.com/pfsense/en/latest/releases/2-9-0.html respectively. … Detailed patch versions, workarounds, and compensating controls in full report. |
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External POC / Exploit Code
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