Opnsense: Security Vulnerabilities
OPNsense 19.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious scripts by exploiting insufficient input validation in the host parameter. Attackers can submit crafted POST requests to the diag_ping.php endpoint with script payloads in the host parameter to execute arbitrary JavaScript in users' browsers.
CVSS Score
5.1
EPSS Score
0.001
Published
2026-02-15
OPNsense 19.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious scripts by exploiting insufficient input validation in the host parameter. Attackers can submit crafted payloads through POST requests to diag_traceroute.php to execute arbitrary JavaScript in the context of a user's browser session.
CVSS Score
5.1
EPSS Score
0.001
Published
2026-02-15
OPNsense before 25.1.8 contains an authenticated command injection vulnerability in its Bridge Interface Edit endpoint (interfaces_bridge_edit.php). The span POST parameter is concatenated into a system-level command without proper sanitization or escaping, allowing an administrator to inject arbitrary shell operators and payloads. Successful exploitation results in remote code execution with the privileges of the web service (typically root), potentially leading to full system compromise or lateral movement. This vulnerability arises from inadequate input validation and improper handling of user-supplied data in backend command invocations.
CVSS Score
9.1
EPSS Score
0.012
Published
2025-08-27
DECISO OPNsense 23.1 does not impose rate limits for authentication, allowing attackers to perform a brute-force attack to bypass authentication.
CVSS Score
9.8
EPSS Score
0.001
Published
2023-10-23
OPNsense before 23.7.5 allows XSS via the index.php column_count parameter to the Lobby Dashboard.
CVSS Score
5.4
EPSS Score
0.002
Published
2023-09-28
OPNsense before 23.7.5 allows XSS via the index.php sequence parameter to the Lobby Dashboard.
CVSS Score
5.4
EPSS Score
0.002
Published
2023-09-28
Insecure permissions in the configuration directory (/conf/) of OPNsense Community Edition before 23.7 and Business Edition before 23.4.2 allow attackers to access sensitive information (e.g., hashed root password) which could lead to privilege escalation.
CVSS Score
9.8
EPSS Score
0.001
Published
2023-08-09
Insecure permissions exist for configd.socket in OPNsense Community Edition before 23.7 and Business Edition before 23.4.2.
CVSS Score
7.5
EPSS Score
0.005
Published
2023-08-09
The Crash Reporter (crash_reporter.php) component of OPNsense Community Edition before 23.7 and Business Edition before 23.4.2 mishandles input sanitization.
CVSS Score
5.4
EPSS Score
0.001
Published
2023-08-09
/ui/cron/item/open in the Cron component of OPNsense Community Edition before 23.7 and Business Edition before 23.4.2 allows XSS via openAction in app/controllers/OPNsense/Cron/ItemController.php.
CVSS Score
9.6
EPSS Score
0.541
Published
2023-08-09