Firefox < 44.0.2 Service Workers Security Bypass

Medium Nessus Plugin ID 88754


The remote Windows host contains a web browser that is affected by a security bypass vulnerability.


The version of Mozilla Firefox installed on the remote Windows host is prior to 44.0.2. It is, therefore, affected by a security bypass vulnerability due to improper restriction of interaction between service workers and plugins. An unauthenticated, remote attacker can exploit this, via a crafted web site that triggers spoofed responses to requests that use NPAPI, to bypass the same-origin policy.


Upgrade to Mozilla Firefox version 44.0.2 or later.

See Also

Plugin Details

Severity: Medium

ID: 88754

File Name: mozilla_firefox_44_0_2.nasl

Version: 1.8

Type: local

Agent: windows

Family: Windows

Published: 2016/02/16

Updated: 2019/11/20

Dependencies: 20862

Risk Information

Risk Factor: Medium

CVSS Score Source: CVE-2016-1949

CVSS v2.0

Base Score: 6.8

Temporal Score: 5

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

Base Score: 8.8

Temporal Score: 7.7

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:mozilla:firefox

Required KB Items: Mozilla/Firefox/Version

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2016/02/11

Vulnerability Publication Date: 2016/02/11

Reference Information

CVE: CVE-2016-1949

MFSA: 2016-13