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Vulnerability details: VCID-b9yp-ypbq-7uah
Vulnerability ID VCID-b9yp-ypbq-7uah
Aliases CVE-2016-9073
Summary WebExtensions can bypass security checks to load privileged URLs and potentially escape the WebExtension sandbox.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-264 Permissions, Privileges, and Access Controls
System Score Found at
cvssv3 7.5 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-9073.json
epss 0.00807 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
epss 0.00807 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
epss 0.00807 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
epss 0.00807 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
epss 0.00807 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
epss 0.00807 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
epss 0.00807 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
epss 0.00807 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
epss 0.00807 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
epss 0.00807 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
epss 0.00847 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
epss 0.00847 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
epss 0.00847 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
epss 0.00847 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
epss 0.00847 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
epss 0.00847 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
epss 0.00847 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
epss 0.00847 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
epss 0.00847 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
epss 0.00847 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
epss 0.00847 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
epss 0.00847 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
epss 0.00847 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
epss 0.00847 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
epss 0.00847 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
epss 0.00847 https://api.first.org/data/v1/epss?cve=CVE-2016-9073
cvssv2 4 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 5.0 https://nvd.nist.gov/vuln/detail/CVE-2016-9073
cvssv3 7.5 https://nvd.nist.gov/vuln/detail/CVE-2016-9073
archlinux Critical https://security.archlinux.org/AVG-72
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2016-89
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-9073.json
https://api.first.org/data/v1/epss?cve=CVE-2016-9073
https://bugzilla.mozilla.org/show_bug.cgi?id=1289273
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://www.mozilla.org/security/advisories/mfsa2016-89/
http://www.securityfocus.com/bid/94337
http://www.securitytracker.com/id/1037298
1396545 https://bugzilla.redhat.com/show_bug.cgi?id=1396545
ASA-201611-16 https://security.archlinux.org/ASA-201611-16
AVG-72 https://security.archlinux.org/AVG-72
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*
CVE-2016-9073 https://nvd.nist.gov/vuln/detail/CVE-2016-9073
mfsa2016-89 https://www.mozilla.org/en-US/security/advisories/mfsa2016-89
USN-3124-1 https://usn.ubuntu.com/3124-1/
No exploits are available.
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-9073.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:H/Au:N/C:P/I:P/A:N Found at https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2016-9073
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2016-9073
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.73296
EPSS Score 0.00807
Published At Sept. 9, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-31T08:09:14.623793+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2016/mfsa2016-89.yml 37.0.0