Netgate pfSense CE (prior to 2.8.0 beta release) and corresponding Plus builds is vulnerable to Cross-site scripting (XSS) in the Automatic Configuration Backup (ACB) service, allowing remote attackers to execute arbitrary JavaScript, delete backups, or leak sensitive information via an unsanitized "reason" field and a derivable device key generated from the public SSH key.
https://www.netgate.com/blog/important-security-updates-for-pfsense-plus-24.11-and-ce-2.7.2
https://docs.netgate.com/downloads/pfSense-SA-25_03.webgui.asc
https://blog.brillantit.com/exploiting-pfsense-xss-command-injection-cloud-hijack/