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TI-2026-74976 Aliases CVE-2026-111233

Reflected cross-site scripting in Netgate pfSense CE firewall rules

Priority MEDIUM 45CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Passive
Attack complexity
High
Attack requirements
Present
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

Netgate pfSense CE from 2.7.1 through 2.9.0 is affected. The firewall_rules.php page does not encode the if parameter, which lets remote attackers inject script (CWE-79). When the non-default Require Firewall Interface option is enabled, an attacker can lure a user with firewall rules privileges into opening a crafted GET link that runs script in the WebGUI with that user's privileges. A public exploit is linked in the references.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01064 64th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
NetgatepfSense CE2.7.1 – 2.9.0—No fix listedCNA
  • pfSense CE VendorNetgate Affected 2.7.1 – 2.9.0 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:pfsense:pfsense:*:*:*:*:community:*:*:*2.7.1 – 2.9.0VulnerablepfSense
  • cpe:2.3:a:pfsense:pfsense:*:*:*:*:community:*:*:* Versions 2.7.1 – 2.9.0 Vulnerable ·pfSense

Remediation

The sources list no fixed version for pfSense CE.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

  1. 2026-10-16 Threatist record created from CVE-2026-111233
  2. 2026-10-20 EPSS moved to the 50th–90th percentile
  3. 2026-10-20 CVSS score added · NVD

References

Exploit 1

Other 3

  • TI-2022-13704 pfSense pfBlockerNG through 2.1.4_26 allows remote attackers to execute arbitrary OS… CVSS 3.1CRITICAL 9.8
  • TI-2023-12003 A command injection vulnerability in the function restore_rrddata() of Netgate pfSense… CVSS 3.1HIGH 8.8
  • TI-2024-31010 A cross-site scripting (XSS) vulnerability in pfsense v2.5.2 allows attackers to execute… CVSS 3.1CRITICAL 9.3
  • TI-2023-11923 Improper restriction of excessive authentication attempts in the SSHGuard component of… CVSS 3.1CRITICAL 9.8
  • TI-2023-26046 An issue in Netgate pfSense Plus v.23.05.1 and before and pfSense CE v.2.7.0 allows a… CVSS 3.1HIGH 8.8
  • TI-2023-22567 An issue in Netgate pfSense v.2.7.0 allows a remote attacker to execute arbitrary code… CVSS 3.1HIGH 8.8
See all 92 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences