cvedb.io
CVE-2021-4138
MEDIUM · CVSS 5.3
EPSS exploitation probability: 0%
Published 2022-05-02T23:15:08.057 · Last modified 2026-06-17T04:19:06.103

Summary

Improved Host header checks to reject requests not sent to a well-known local hostname or IP, or the server-specified hostname.

Affected products

mozilla — geckodriver

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References

This product uses data from the NVD API but is not endorsed or certified by the NVD. Informational only; not professional security advice.