CVE-2026-56128

pfSense Plus < 26.07 / CE < 2.9.0 Stored XSS via firewall_schedule_edit.php

Published Sep 3, 2026 CVSS 4.0 · 5.1 Medium EPSS 1.1% KEV · Not listed
Description
pfSense Plus before 26.07 and CE before 2.9.0 allow authenticated users with the Firewall: Schedules: Edit privilege to inject arbitrary JavaScript via the descr parameter in /firewall_schedule_edit.php. The schedule description is stored without HTML sanitization and subsequently inserted into an HTML attribute value in /firewall_rules.php with only single-quote escaping applied, permitting double-quote breakout. The payload executes in the browser of any user with the Firewall: Rules privilege who views the rules list with the affected schedule attached.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Netgate pfsense
CPEs cpe:2.3:a:netgate:pfsense:*:*:*:*:*:*:*:*
cpe:2.3:a:netgate:pfsense_plus:*:*:*:*:*:*:*:*
Vendors & Products Netgate pfsense
Type Values Removed Values Added
Metrics ssvc

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

Type Values Removed Values Added
First Time appeared Netgate
Netgate pfsense Ce
Netgate pfsense Plus
Vendors & Products Netgate
Netgate pfsense Ce
Netgate pfsense Plus
Type Values Removed Values Added
Description pfSense Plus before 26.07 and CE before 2.9.0 allow authenticated users with the Firewall: Schedules: Edit privilege to inject arbitrary JavaScript via the descr parameter in /firewall_schedule_edit.php. The schedule description is stored without HTML sanitization and subsequently inserted into an HTML attribute value in /firewall_rules.php with only single-quote escaping applied, permitting double-quote breakout. The payload executes in the browser of any user with the Firewall: Rules privilege who views the rules list with the affected schedule attached.
Title pfSense Plus < 26.07 / CE < 2.9.0 Stored XSS via firewall_schedule_edit.php
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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 1, 2026, 7:19 PM
Reserved
Jun 18, 2026, 7:15 PM
Status
Awaiting Analysis
Published
Sep 3, 2026, 3:17 PM
Modified
Sep 9, 2026, 8:41 PM
Severity
Moderate
Public date
Sep 3, 2026, 2:22 PM