CVE-2019-25377

OPNsense 19.1 Reflected XSS via system_advanced_sysctl.php

CVSS 4.8 MEDIUMEPSS 0.2%CWE-79

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 4.8EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

15 Feb 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

OPNsense 19.1 contains a reflected cross-site scripting vulnerability in the system_advanced_sysctl.php endpoint that allows attackers to inject malicious scripts via the value parameter. Attackers can craft POST requests with script payloads in the value parameter to execute JavaScript in the context of authenticated user sessions.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Affected products

Opnsense · OPNsense

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References

https://forum.opnsense.org/index.php?topic=11469.0 https://opnsense.org https://www.exploit-db.com/exploits/46351 https://www.vulncheck.com/advisories/opnsense-reflected-xss-via-systemadvancedsysctlphp