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Vulnerability details: VCID-gqhc-h5p7-dyh1
Vulnerability ID VCID-gqhc-h5p7-dyh1
Aliases CVE-2016-9903
Summary Mozilla's add-ons SDK had a world-accessible resource with an HTML injection vulnerability. If an additional vulnerability allowed this resource to be loaded as a document it could allow injecting content and script into an add-on's context.
Status Published
Exploitability 0.5
Weighted Severity 9.0
Risk 4.5
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
System Score Found at
epss 0.0071 https://api.first.org/data/v1/epss?cve=CVE-2016-9903
epss 0.0071 https://api.first.org/data/v1/epss?cve=CVE-2016-9903
epss 0.0071 https://api.first.org/data/v1/epss?cve=CVE-2016-9903
epss 0.0071 https://api.first.org/data/v1/epss?cve=CVE-2016-9903
epss 0.0071 https://api.first.org/data/v1/epss?cve=CVE-2016-9903
epss 0.0071 https://api.first.org/data/v1/epss?cve=CVE-2016-9903
epss 0.0071 https://api.first.org/data/v1/epss?cve=CVE-2016-9903
epss 0.0071 https://api.first.org/data/v1/epss?cve=CVE-2016-9903
epss 0.0071 https://api.first.org/data/v1/epss?cve=CVE-2016-9903
epss 0.0071 https://api.first.org/data/v1/epss?cve=CVE-2016-9903
cvssv2 0 https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
cvssv2 4.3 https://nvd.nist.gov/vuln/detail/CVE-2016-9903
cvssv3 6.1 https://nvd.nist.gov/vuln/detail/CVE-2016-9903
archlinux Critical https://security.archlinux.org/AVG-106
generic_textual critical https://www.mozilla.org/en-US/security/advisories/mfsa2016-94
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2016-9903
https://bugzilla.mozilla.org/show_bug.cgi?id=1315435
https://ftp.suse.com/pub/projects/security/yaml/suse-cvss-scores.yaml
https://www.mozilla.org/security/advisories/mfsa2016-94/
http://www.securityfocus.com/bid/94883
http://www.securitytracker.com/id/1037461
ASA-201612-15 https://security.archlinux.org/ASA-201612-15
AVG-106 https://security.archlinux.org/AVG-106
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-2016-9903 https://nvd.nist.gov/vuln/detail/CVE-2016-9903
mfsa2016-94 https://www.mozilla.org/en-US/security/advisories/mfsa2016-94
USN-3155-1 https://usn.ubuntu.com/3155-1/
No exploits are available.
Vector: AV:N/AC:H/Au:M/C:N/I:N/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-2016-9903
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:R/S:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2016-9903
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 0.72165
EPSS Score 0.0071
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T13:16:32.247971+00:00 Mozilla Importer Import https://github.com/mozilla/foundation-security-advisories/blob/master/announce/2016/mfsa2016-94.yml 38.0.0