CVE-2025-50989

Description

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 v3.1 Score

9.1

CRITICAL

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

Weakness Type (CWE)

CWE-78 OS Command Injection

CWE-77 CWE-77

Affected Products

Vendor	Product	Versions
opnsense	opnsense	< 25.1.8

References

Exploits

https://github.com/4rdr/proofs/blob/main/info/OPNsense-25.1-Command-Injection-via-span-parameter.md

Other References

https://github.com/opnsense/changelog/blob/640e96ed6a783254283aead0d0b744fc9143ce6d/community/25.1/25.1.8#L34

Frequently Asked Questions

What is CVE-2025-50989? +

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. It has a CVSS v3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2025-50989? +

CVE-2025-50989 has a CVSS v3.1 score of 9.1 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately.

What products are affected by CVE-2025-50989? +

CVE-2025-50989 affects products from opnsense, specifically: opnsense. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-50989? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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