Bypassing URI Limitations in Firefox WebExtensions

CVE-2018-18497 · MEDIUM Severity

AV:N/AC:M/AU:N/C:P/I:N/A:N

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.

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