CVE-2019-25369

OPNsense 19.1 Stored XSS via system_advanced_sysctl.php

CVSS 5.1 MEDIUMEPSS 0.2%CWE-79

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.1EPSS 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 stored cross-site scripting vulnerability in the system_advanced_sysctl.php endpoint that allows attackers to inject persistent malicious scripts via the tunable parameter. Attackers can submit POST requests with script payloads that are stored and executed in the context of authenticated user sessions when the page is viewed.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/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-stored-xss-via-systemadvancedsysctlphp