ADVISORIES

• CVE-2021-23435 (NVD)
• GHSA-4hpq-rjcx-7vj9

GEM

clearance

SEVERITY

CVSS v3.x: 7.6 (High)

PATCHED VERSIONS

• >= 2.5.0

DESCRIPTION

This affects the package clearance before 2.5.0. The vulnerability can be possible when users are able to set the value of session[:return_to]. If the value used for return_to contains multiple leading slashes (/////example.com) the user ends up being redirected to the external domain that comes after the slashes (http://example.com).