CVE-2018-5168

Publication date 10 May 2018

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Sites can bypass security checks on permissions to install lightweight themes by manipulating the "baseURI" property of the theme element. This could allow a malicious site to install a theme without user interaction which could contain offensive or embarrassing images. This vulnerability affects Thunderbird < 52.8, Thunderbird ESR < 52.8, Firefox < 60, and Firefox ESR < 52.8.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
firefox	18.04 LTS bionic	Fixed 60.0+build2-0ubuntu1
	17.10 artful	Fixed 60.0+build2-0ubuntu0.17.10.1
	16.04 LTS xenial	Fixed 60.0+build2-0ubuntu0.16.04.1
	14.04 LTS trusty	Fixed 60.0+build2-0ubuntu0.14.04.1
thunderbird	18.04 LTS bionic	Fixed 1:52.8.0+build1-0ubuntu0.18.04.1
	17.10 artful	Fixed 1:52.8.0+build1-0ubuntu0.17.10.1
	16.04 LTS xenial	Fixed 1:52.8.0+build1-0ubuntu0.16.04.1
	14.04 LTS trusty	Fixed 1:52.8.0+build1-0ubuntu0.14.04.1

Severity score breakdown

CVSS version: CVSS v3.0

Base score 5.3 · Medium

Base metrics

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

Scores

Parameter	Value
Base score	5.3 · Medium
Exploitability score	-
Impact score	-

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

References

Related Ubuntu Security Notices (USN)

USN-3645-1
Firefox vulnerabilities
11 May 2018

USN-3660-1
Thunderbird vulnerabilities
25 May 2018