CVE-2021-4138 Information

Description

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

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Reference

https://bugzilla.mozilla.org/show_bug.cgi?id=1652612 https://github.com/mozilla/geckodriver/releases/tag/v0.30.0

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

LOW

Base Score

NONE

Base Severity

5.3