CVE-2018-5105

high

Description

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.

References

Advisories
More

https://usn.ubuntu.com/3544-1/

http://www.securitytracker.com/id/1040270

http://www.securityfocus.com/bid/102786

https://www.mozilla.org/security/advisories/mfsa2018-02/

https://euvd.enisa.europa.eu/vulnerability/EUVD-2018-16891

https://bugzilla.mozilla.org/show_bug.cgi?id=1390882

Details

Source: Mitre, NVD

Published: 2018-06-11

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 7.2

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H