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Vulnerability details: VCID-yy4z-p3f1-qbbc
Vulnerability ID VCID-yy4z-p3f1-qbbc
Aliases CVE-2016-9076
Summary An issue where a <select> dropdown menu can be used to cover location bar content, resulting in potential spoofing attacks. This attack requires e10s to be enabled in order to function.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-20 Improper Input Validation
System Score Found at
cvssv3 5.9 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-9076.json
epss 0.00528 https://api.first.org/data/v1/epss?cve=CVE-2016-9076
epss 0.00528 https://api.first.org/data/v1/epss?cve=CVE-2016-9076
epss 0.00528 https://api.first.org/data/v1/epss?cve=CVE-2016-9076
epss 0.00528 https://api.first.org/data/v1/epss?cve=CVE-2016-9076
epss 0.00528 https://api.first.org/data/v1/epss?cve=CVE-2016-9076
epss 0.00528 https://api.first.org/data/v1/epss?cve=CVE-2016-9076
epss 0.00528 https://api.first.org/data/v1/epss?cve=CVE-2016-9076
epss 0.00528 https://api.first.org/data/v1/epss?cve=CVE-2016-9076
epss 0.00528 https://api.first.org/data/v1/epss?cve=CVE-2016-9076
epss 0.00528 https://api.first.org/data/v1/epss?cve=CVE-2016-9076
cvssv2 5.8 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2016-9076
cvssv3 5.9 https://nvd.nist.gov/vuln/detail/CVE-2016-9076
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-2016-9076.json
https://api.first.org/data/v1/epss?cve=CVE-2016-9076
https://bugzilla.mozilla.org/show_bug.cgi?id=1276976
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
1396537 https://bugzilla.redhat.com/show_bug.cgi?id=1396537
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-2016-9076 https://nvd.nist.gov/vuln/detail/CVE-2016-9076
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:H/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2016-9076.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:M/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:M/Au:N/C:N/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2016-9076
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:H/PR:N/UI:N/S:U/C:N/I:H/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2016-9076
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 0.67067
EPSS Score 0.00528
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T13:16:33.600506+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2016/mfsa2016-89.yml 38.0.0