Vulnerability in Mozilla Firefox
CVE-2018-5105
WebExtensions can bypass user prompts to first save and then open an arbitrarily downloaded file. This can result in an executable file running with local user privileges without explicit user consent. This vulnerability affects Firefox < 58.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (34.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 34.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Mozilla Firefox — versions unspecified
- Canonical Ubuntu Linux — versions 14.04, 16.04, 17.10
References
- www.securitytracker.com/id/1040270 (VDB Entry, Third Party Advisory, vdb-entry)
- bugzilla.mozilla.org/show_bug.cgi (Permissions Required, Issue Tracking)
- usn.ubuntu.com/3544-1/ (vendor-advisory, Third Party Advisory)
- www.securityfocus.com/bid/102786 (VDB Entry, Third Party Advisory, vdb-entry)
- www.mozilla.org/security/advisories/mfsa2018-02/ (Vendor Advisory)
Frequently asked questions
- What is CVE-2018-5105?
- CVE-2018-5105 is a high-severity vulnerability in Mozilla Firefox. CVSS score: 7.8/10. Published 2018-06-11.
- How severe is CVE-2018-5105?
- High severity. CVSS v3 base score is 7.8 out of 10.