CVE-2018-18497

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CVSS 3.0

6.5 medium

EPSS

1%p71

Published

Feb 28, 2019 (Feb 28, 2019)

Modified

Jun 17, 2026

Description

Limitations on the URIs allowed to WebExtensions by the browser.windows.create API can be bypassed when a pipe in the URL field is used within the extension to load multiple pages as a single argument. This could allow a malicious WebExtension to open privileged about: or file: locations. This vulnerability affects Firefox < 64.

Vendors: mozilla canonical
Products: firefox, ubuntu linux
Vector: CVSS:3.0/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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