CVE-2026-56127
pfSense Plus < 26.07 / CE < 2.9.0 Stored XSS via firewall_rules_edit.php
CVSS Score
5.4
EPSS Score
0.0%
EPSS Percentile
0th
pfSense Plus before 26.07 and CE before 2.9.0 allow authenticated users with the Firewall: Rules: Edit privilege to inject arbitrary JavaScript via the descr parameter in /firewall_rules_edit.php. The firewall rule description is stored in the pfSense XML configuration with only backslash-escaping applied and no HTML sanitization, then rendered without encoding in the firewall log table in /status_logs_filter.php. The payload executes in the browser of any user with the Status: Logs: Firewall privilege who views the affected log entries.
| CWE | CWE-79 |
| Vendor | netgate |
| Product | pfsense plus |
| Published | Sep 3, 2026 |
| Last Updated | Sep 3, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
Netgate / pfSense Plus
0 < 26.07
Netgate / pfSense CE
0 < 2.9.0
References
docs.netgate.com: https://docs.netgate.com/downloads/pfSense-SA-26_10.webgui.asc docs.netgate.com: https://docs.netgate.com/pfsense/en/latest/releases/26-07.html docs.netgate.com: https://docs.netgate.com/pfsense/en/latest/releases/2-9-0.html vulncheck.com: https://www.vulncheck.com/advisories/pfsense-plus-ce-stored-xss-via-firewall-rules-edit-php
Credits
Alex Williams from Pellera Technologies VulnCheck