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CVE-2021-22881 PUBLISHED

The Host Authorization middleware in Action Pack before 6.1.2.1, 6.0.3.5 suffers from an 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. Impacted applications will have allowed hosts with a leading dot. When an allowed host contains a leading dot, a specially crafted `Host` header can be used to redirect to a malicious website.

EPSS 15.45% · 94.6th percentile

Risk Scores

EPSS Score
15.45%
94.6th percentile

Affected Products

VendorProductVersions
Ubuntu:Pro:16.04:LTSrails0, 2:4.1.10-1, 2:4.2.5-1
Ubuntu:Pro:22.04:LTSrails2:6.0.3.7+dfsg-2, *, 2:6.1.4.1+dfsg-8ubuntu2+esm1
Ubuntu:25.10rails2:7.2.2.1+dfsg-7, 0, 2:6.1.7.3+dfsg-7
Ubuntu:24.04:LTSrails2:6.1.7.3+dfsg-3, 0, 2:6.1.7.3+dfsg-2build1
Ubuntu:Pro:18.04:LTSrails2:4.2.10-0ubuntu4+esm2, 2:4.2.10-0ubuntu4+esm1, 2:4.2.10-0ubuntu4
Ubuntu:Pro:20.04:LTSrails0, 2:5.2.3+dfsg-3, 2:5.2.3+dfsg-3ubuntu0.1~esm1

Timeline

References

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