CyberRota Analysis
This is a medium severity vulnerability with a CVSS score of 6.1. See the original NVD description below for full technical details.
CVE
CVE-2021-22903
Severity
MEDIUM
CVSS
6.1
EPSS
1.22%
Original NVD Description
The actionpack ruby gem before 6.1.3.2 suffers from a possible open redirect vulnerability. Specially crafted Host headers in combination with certain "allowed host" formats can cause the Host Authorization middleware in Action Pack to redirect users to a malicious website. This is similar to CVE-2021-22881. Strings in config.hosts that do not have a leading dot are converted to regular expressions without proper escaping. This causes, for example, `config.hosts << "sub.example.com"` to permit a request with a Host header value of `sub-example.com`.
Related CVEs
Other vulnerabilities affecting the same vendor(s)