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2.3

pfSense CE allows malicious link to run scripts in WebGUI

CVE-2026-111233 · published 3 days ago
Summary

Versions 2.7.1 through 2.9.0 of pfSense CE’s firewall rule page can be tricked into running code that an attacker supplies in a web link. If the optional “Require Firewall Interface” setting is turned on, a user with firewall‑rule privileges who clicks the crafted link could have the attacker’s script run in the management interface. Upgrade to a patched version or disable the setting until you can apply the update.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
netgate pfsense ce <= 2.9.0
Original advisory text
Netgate pfSense CE 2.7.1 through 2.9.0 Reflected XSS via firewall_rules.php
Netgate pfSense CE 2.7.1 through 2.9.0 contains a reflected cross-site scripting vulnerability in firewall_rules.php that allows remote attackers to inject script via the unencoded if parameter. When the non-default Require Firewall Interface option is enabled, attackers can lure users with firewall rules privileges into opening a crafted GET link to execute script in the WebGUI with their privileges.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit
  • Gives an attacker partial control
Severity
2.3 Low
Exploitation
<1% chance of attack within 30 days
Type
CWE-79Cross-site Scripting (XSS)
Timeline
Published15 Oct 2026
Updated16 Oct 2026
First seen15 Oct 2026
Sources
CVE-2026-111233 · NVD
CVE-2026-111233 · MITRE
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