CVE-2018-5105

Publication date 23 January 2018

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
firefox	18.04 LTS bionic	Fixed 59.0.1+build1-0ubuntu1
	17.10 artful	Fixed 58.0+build6-0ubuntu0.17.10.1
	16.04 LTS xenial	Fixed 58.0+build6-0ubuntu0.16.04.1
	14.04 LTS trusty	Fixed 58.0+build6-0ubuntu0.14.04.1

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.8 · High

Base metrics

Parameter	Value
Attack vector	Local
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality impact	High
Integrity impact	High
Availability impact	High

Scores

Parameter	Value
Base score	7.8 · High
Exploitability score	-
Impact score	-

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

References

Related Ubuntu Security Notices (USN)

USN-3544-1
Firefox vulnerabilities
24 January 2018