Description
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.
Metrics
CVSS 3.1 6.1/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:NWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Opnsense | OPNsense | 19.1 |
References
- https://forum.opnsense.org/index.php?topic=11469.0Release Notes
- https://opnsense.orgProduct
- https://www.exploit-db.com/exploits/46351Exploit, Third Party Advisory, VDB Entry
- https://www.vulncheck.com/advisories/opnsense-reflected-xss-via-systemadvancedsysctlphpBroken Link
Timeline
- Published
- Feb 15, 2026
- Last modified
- Jun 17, 2026
- NVD status
- Analyzed