Netgate pfSense Plus/pfSense CE Schedule firewall_schedule_edit.php descr cross site scripting

Summaryinfo

A vulnerability, which was classified as problematic, was found in Netgate pfSense Plus and pfSense CE. Affected by this vulnerability is an unknown functionality of the file firewall_schedule_edit.php of the component Schedule. The manipulation of the argument descr results in cross site scripting. This vulnerability is reported as CVE-2026-56128. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Netgate pfSense Plus and pfSense CE (affected version not known). Affected is some unknown functionality of the file firewall_schedule_edit.php of the component Schedule. The manipulation of the argument descr with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. This is going to have an impact on integrity. CVE summarizes:

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.

The advisory is available at docs.netgate.com. This vulnerability is traded as CVE-2026-56128 since 06/18/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1059.007 by the MITRE ATT&CK project.

By approaching the search of inurl:firewall_schedule_edit.php it is possible to find vulnerable targets with Google Hacking.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Firewall Software

Vendor

• Netgate

Name

• pfSense CE
• pfSense Plus

License

• open-source

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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