CVE-2018-18495

medium
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

WebExtension content scripts can be loaded into about: pages in some circumstances, in violation of the permissions granted to extensions. This could allow an extension to interfere with the loading and usage of these pages and use capabilities that were intended to be restricted from extensions. This vulnerability affects Firefox < 64.

References

http://www.securityfocus.com/bid/106167

https://bugzilla.mozilla.org/show_bug.cgi?id=1427585

https://usn.ubuntu.com/3844-1/

https://www.mozilla.org/security/advisories/mfsa2018-29/

Details

Source: MITRE

Published: 2019-02-28

Updated: 2020-08-24

Type: CWE-732

Risk Information

CVSS v2

Base Score: 4.3

Vector: AV:N/AC:M/Au:N/C:P/I:N/A:N

Impact Score: 2.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 6.5

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

Impact Score: 3.6

Exploitability Score: 2.8

Severity: MEDIUM

Tenable Plugins

View all (6 total)

IDNameProductFamilySeverity
122192Mozilla Firefox < 64.0NessusMacOS X Local Security Checks
critical
700411Mozilla Firefox < 64 Multiple VulnerabilitiesNessus Network MonitorWeb Clients
critical
119654Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 18.10 : Firefox vulnerabilities (USN-3844-1)NessusUbuntu Local Security Checks
critical
119636FreeBSD : mozilla -- multiple vulnerabilities (d10b49b2-8d02-49e8-afde-0844626317af)NessusFreeBSD Local Security Checks
critical
119604Mozilla Firefox < 64.0 Multiple VulnerabilitiesNessusWindows
critical
119603Mozilla Firefox < 64.0 Multiple Vulnerabilities (macOS) (deprecated)NessusMacOS X Local Security Checks
critical