CVE-2021-22903CWE-601

The actionpack ruby gem before 6.1.3.2 suffers from a possible open redirect vulnerability

published June 11, 2021

CVSS
—
EPSS
1%
Percentile
68.7
In the wild
Unconfirmed
What it is

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`.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.01230 · 68.7th percentile
Weakness
CWE-601 · URL Redirection to Untrusted Site ('Open Redirect')
Published
2021-06-11T15:49Z
EPSS history
Timeline
  • 11 JUN 15:49Z
    The actionpack ruby gem before 6.1.3.2 suffers from a possible open redirect vulnerability
    cvelistv5