CVE-2021-22903 | BDVDB-2026-155321 Detail

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`.

Impact#

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Exploit#

History#

1. Version 12021-06-11Record published in the CVE List.
2. Version 22024-08-03Most recent update recorded in the CVE List.