CVE-2023-6209

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CVSS 3.1

6.5 medium

EPSS

1%p71

Published

Nov 21, 2023 (Nov 21, 2023)

Modified

Jun 17, 2026

Description

Relative URLs starting with three slashes were incorrectly parsed, and a path-traversal "/../" part in the path could be used to override the specified host. This could contribute to security problems in web sites. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.

Vendors: mozilla debian
Products: firefox, firefox esr, thunderbird, debian linux
Weakness: CWE-22
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

NVD CVE.org GitHub PoCs EPSS (1.4%)

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