# CVE-2026-111233: Netgate pfSense CE reflected XSS in firewall_rules.php

Source: https://junglewise.ai/threats/cve-2026-111233-netgate-pfsense-ce-2-7-1-through-2-9-0-contains-a-reflected  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-15. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-111233 · Severity: medium · CVSS 4.7 · Published 2026-10-15

pfSense CE is an open-source firewall that protects networks through a web-based administration interface. A reflected cross-site scripting vulnerability in the firewall rules page allows attackers to inject malicious scripts that execute with administrator privileges if a user clicks a crafted link. When the "Require Firewall Interface" option is enabled, users with firewall rules privileges who open the attacker's link can have their WebGUI session compromised.

Technologies: [Netgate Pfsense Ce](https://junglewise.ai/threats/technologies/pfsense-ce). Vendors: [Netgate](https://junglewise.ai/threats/vendors/netgate).

## Quick answers

**Is CVE-2026-111233 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-111233 being exploited in the wild.

**How severe is CVE-2026-111233?** Medium severity, with a CVSS score of 4.7, published 15 October 2026.

**Which products and versions are affected?** Netgate Pfsense Ce 2.7.1 through 2.9.0.

**Is there a fix for CVE-2026-111233?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-111233 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-111233?** Check whether you run Netgate Pfsense Ce at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A reflected XSS vulnerability exists in firewall_rules.php where the unencoded "if" parameter allows script injection. The attack is reflected—the payload appears in the HTTP request itself—and requires the non-default "Require Firewall Interface" setting to be enabled plus user interaction (clicking a malicious link). An attacker with no authentication can craft a link that, when clicked by an authenticated administrator, executes JavaScript in their WebGUI session.

## Affected products

- Netgate pfSense CE 2.7.1 through 2.9.0

## Timeline

- 2026-10-15: disclosed

## References

- [https://github.com/](https://github.com/)
- [https://abraxaslabs.tech/research/pfsense-ce-leftovers](https://abraxaslabs.tech/research/pfsense-ce-leftovers)

## Related threats

- [Netgate pfSense CE stored cross-site scripting in firewall rules](https://junglewise.ai/threats/cve-2026-111232-netgate-pfsense-ce-2-3-0-through-2-9-0-contains-a-stored-cross)
- [Netgate pfSense CE authorization bypass in config restore](https://junglewise.ai/threats/cve-2026-111231-netgate-pfsense-ce-through-2-9-0-contains-an-authorization)
- [Netgate pfSense CE local file read via Dynamic DNS](https://junglewise.ai/threats/cve-2026-111230-netgate-pfsense-ce-through-2-9-0-contains-a-local-file-read)
- [pfSense CE command injection in captive portal HA sync](https://junglewise.ai/threats/cve-2026-111229-pfsense-ce-2-7-0-through-2-9-0-contains-a-command-injection)
- [Netgate pfSense CE CRLF injection in Unbound configuration](https://junglewise.ai/threats/cve-2026-111228-netgate-pfsense-ce-from-2-7-1-through-2-9-0-contains-a-crlf)