CVE-2018-18497
MEDIUMFirefox < 64.0 - Privilege Escalation via WebExtension URI Bypass
Title source: llmDescription
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.
References (4)
Core 4
Core References
Issue Tracking, Permissions Required, Vendor Advisory x_refsource_confirm
https://bugzilla.mozilla.org/show_bug.cgi?id=1488180
Vendor Advisory x_refsource_confirm
https://www.mozilla.org/security/advisories/mfsa2018-29/
Third Party Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/3844-1/
Third Party Advisory, VDB Entry vdb-entry
x_refsource_bid
http://www.securityfocus.com/bid/106167
Scores
CVSS v3
6.5
EPSS
0.0022
EPSS Percentile
44.1%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Details
Status
published
Products (5)
canonical/ubuntu_linux
14.04
canonical/ubuntu_linux
16.04
canonical/ubuntu_linux
18.04
canonical/ubuntu_linux
18.10
mozilla/firefox
< 64.0
Published
Feb 28, 2019
Tracked Since
Feb 18, 2026