CVE-2019-25377

4.8 MEDIUM 0.3% exploit odds No fix listed XSS Web app

What it is

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.

At a glance

Exploitability: Can be exploited over the network with a low-privilege account, but needs a user to act. Limited direct impact.
Exploit odds: 0.3% chance of exploitation in the next 30 days (EPSS).
Fix: No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

2026-02-15 14:16 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 02:32 UTC Last updatedMost recent change to the record

Details

Published: 2026-02-15 14:16 UTC
Last modified: 2026-06-17 02:32 UTC
Exploit probability: 0.3% · EPSS, next 30 days
Weakness: CWE-79 · Cross-site scripting
Record status: Analyzed

Affected

Opnsense 19.1

Attack profile CVSS 4.0 · 4.8

Attack vector: Network
Complexity: Low
Attack requirements: None
Privileges needed: Low
User interaction: Active
Confidentiality: None
Integrity: None
Availability: None

Raw vector

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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References

NVD record · CVE.org record