{"id":71011,"date":"2025-09-03T20:40:17","date_gmt":"2025-09-03T20:40:17","guid":{"rendered":""},"modified":"2025-10-03T07:09:00","modified_gmt":"2025-10-03T13:09:00","slug":"cve-2025-50989-opnsense-command-injection-vulnerability","status":"publish","type":"post","link":"https:\/\/www.ameeba.com\/blog\/cve-2025-50989-opnsense-command-injection-vulnerability\/","title":{"rendered":"CVE-2025-50989: OPNsense Command Injection Vulnerability<\/strong>"},"content":{"rendered":"

Overview<\/strong><\/p>\n

The cybersecurity ecosystem has recently observed a significant vulnerability CVE-2025-50989, affecting OPNsense 25.1 users. This vulnerability is of particular concern as it lies within an authenticated command injection in the Bridge Interface Edit endpoint (interfaces_bridge_edit.php). The vulnerability’s gravity is underscored by its potential to allow an administrator to inject arbitrary shell operators and payloads, which might lead to a full system<\/a> compromise or data leakage.
\nThis vulnerability is a stark reminder of the risks associated with inadequate input validation and improper<\/a> handling of user-supplied data in backend command invocations. It brings to light the critical need for robust cybersecurity measures in our increasingly digital world, where every potential weak<\/a> spot can be exploited by malicious actors.<\/p>\n

Vulnerability Summary<\/strong><\/p>\n

CVE ID: CVE-2025-50989
\nSeverity: High (CVSS: 8.8)
\nAttack Vector: Network
\nPrivileges Required: Administrator
\nUser Interaction: Required
\nImpact: Full system compromise or data<\/a> leakage<\/p>\n

Affected Products<\/strong><\/p>\n

Product | Affected Versions<\/p>\n

OPNsense | 25.1<\/p>\n

How the Exploit Works<\/strong><\/p>\n

The exploit takes advantage of an authenticated command injection vulnerability<\/a> in the Bridge Interface Edit endpoint of OPNsense. The ‘span’ POST parameter is concatenated into a system-level command without adequate sanitation or escaping. This flaw allows an authenticated administrator to inject arbitrary<\/a> shell operators and payloads. Successful exploitation of this vulnerability permits remote code execution with the privileges<\/a> of the web service, typically root, which could potentially lead to a full system compromise or lateral movement.<\/p>\n

Conceptual Example Code<\/strong><\/p>\n

Here’s a conceptual example of the HTTP request that might exploit this vulnerability<\/a>:<\/p>\n

POST \/interfaces_bridge_edit.php HTTP\/1.1\nHost: target.example.com\nContent-Type: application\/x-www-form-urlencoded\nAuthorization: Basic base64encoded(username:password)\nspan=valid_bridge_span ; injected_shell_command ;<\/code><\/pre>\n
In the above example, “valid_bridge_span” is a legitimate input for the ‘span’ parameter, while “injected_shell_command” is the malicious payload. The separator ‘;’ allows the malicious command to be executed<\/a> after the legitimate one.<\/p>\n
Workarounds and Mitigation<\/strong><\/p>\n
OPNsense users are advised to apply the vendor patch as soon as it is available to fix this vulnerability<\/a>. In the absence of a patch, the use of a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can temporarily mitigate the risk. These systems can be configured to detect and block attempts to exploit this vulnerability<\/a>. It’s also recommended to limit the number of users with administrator privileges and enforce a strong password<\/a> policy to minimize the risk of exploitation.<\/p>\n","protected":false},"excerpt":{"rendered":"
Overview The cybersecurity ecosystem has recently observed a significant vulnerability CVE-2025-50989, affecting OPNsense 25.1 users. This vulnerability is of particular concern as it lies within an authenticated command injection in the Bridge Interface Edit endpoint (interfaces_bridge_edit.php). The vulnerability’s gravity is underscored by its potential to allow an administrator to inject arbitrary shell operators and payloads, […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[1],"tags":[],"vendor":[],"product":[],"attack_vector":[78,80],"asset_type":[],"severity":[],"exploit_status":[],"class_list":["post-71011","post","type-post","status-publish","format-standard","hentry","category-uncategorized","attack_vector-injection","attack_vector-rce"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t