CVE-2023-26494: 
vulnerability analysis and mitigation

CVE-2023-26494 is a vulnerability discovered in lorawan-stack, an open source LoRaWAN network server. The vulnerability was identified on January 11, 2023, acknowledged on February 12, 2023, and patched in version 3.24.1 on February 13, 2023. The issue affects all versions of lorawan-stack prior to version 3.24.1 (GitHub Security Lab).

The vulnerability is classified as an open redirect vulnerability (CWE-601) that exists on the login page of the lorawan stack server. The issue occurs in the /oauth/login and /oauth/token-login endpoints where the application assigns the value of the 'n' parameter directly to window.location without proper validation. The vulnerability has a CVSS v3.1 Base Score of 6.1 (MEDIUM) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N (NVD).

The vulnerability allows malicious actors to conduct phishing attacks by redirecting users to untrusted sites after login. Users are particularly vulnerable as they assume they will be redirected to the homepage upon successful login, but could instead be directed to a malicious domain (GitHub Security Lab).

The vulnerability has been fixed in version 3.24.1 of lorawan-stack. The fix includes implementing proper validation to only allow relative redirects and prevent open redirects by checking if the redirect URL starts with '/' but not '//' (GitHub Commit). Users are advised to upgrade to version 3.24.1 or later to mitigate this vulnerability.