CVE-2019-25377

low-risk
Published 2026-02-15

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.

Do I need to act?

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0.01% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.4/10 Medium
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Opnsense

References (4)

Release Notes https://forum.opnsense.org/index.php?topic=11469.0
Product https://opnsense.org
Exploit https://www.exploit-db.com/exploits/46351
Broken Link https://www.vulncheck.com/advisories/opnsense-reflected-xss-via-systemadvancedsy...
26
/ 100
low-risk
Severity 21/34 · High
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal