Vulnerability in Mozilla Firefox
CVE-2018-18497
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.
EPSS: 0.014 (70.1th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N.
Affected products
- Mozilla Firefox — versions unspecified
- Canonical Ubuntu_linux — versions 14.04, 16.04, 18.04
References
- security@mozilla.org (Vendor Advisory, Permissions Required, x_refsource_CONFIRM, Issue Tracking)
- security@mozilla.org (x_refsource_CONFIRM, Vendor Advisory)
- security@mozilla.org (x_refsource_UBUNTU, vendor-advisory, Third Party Advisory)
- security@mozilla.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
Frequently asked questions
- What is CVE-2018-18497?
- CVE-2018-18497 is a medium-severity vulnerability in Mozilla Firefox. CVSS score: 6.5/10. Published 2019-02-28.
- How severe is CVE-2018-18497?
- Medium severity. CVSS v3 base score is 6.5 out of 10.