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.
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.016 (75.6th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 76th percentile — 75.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.016 · change: +0.002
Affected products
- Mozilla Firefox — versions unspecified
- Canonical Ubuntu Linux — versions 14.04, 16.04, 18.04
References
- bugzilla.mozilla.org/show_bug.cgi (Vendor Advisory, Permissions Required, Issue Tracking)
- www.mozilla.org/security/advisories/mfsa2018-29/ (Vendor Advisory)
- usn.ubuntu.com/3844-1/ (vendor-advisory, Third Party Advisory)
- www.securityfocus.com/bid/106167 (VDB Entry, Third Party Advisory, vdb-entry)
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.