CVE-2019-25369

MEDIUM 6.4

OPNsense 19.1 Stored XSS via system_advanced_sysctl.php

CVSS Score

6.4

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-79
Vendor	opnsense
Product	opnsense
Published	Feb 15, 2026
Last Updated	Mar 5, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Affected Versions

Opnsense / OPNsense

19.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Ozer Goker