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Vulnerability details: VCID-hq5p-xuuk-33f7
Vulnerability ID VCID-hq5p-xuuk-33f7
Aliases CVE-2016-9263
Summary WordPress through 4.8.2, when domain-based flashmediaelement.swf sandboxing is not used, allows remote attackers to conduct cross-domain Flash injection (XSF) attacks by leveraging code contained within the wp-includes/js/mediaelement/flashmediaelement.swf file.
Status Published
Exploitability 0.5
Weighted Severity 4.2
Risk 2.1
Affected and Fixed Packages Package Details
Weaknesses (1)
CWE-20 Improper Input Validation
System Score Found at
epss 0.01241 https://api.first.org/data/v1/epss?cve=CVE-2016-9263
epss 0.01241 https://api.first.org/data/v1/epss?cve=CVE-2016-9263
epss 0.01241 https://api.first.org/data/v1/epss?cve=CVE-2016-9263
epss 0.01241 https://api.first.org/data/v1/epss?cve=CVE-2016-9263
epss 0.01241 https://api.first.org/data/v1/epss?cve=CVE-2016-9263
epss 0.01241 https://api.first.org/data/v1/epss?cve=CVE-2016-9263
epss 0.01241 https://api.first.org/data/v1/epss?cve=CVE-2016-9263
epss 0.01241 https://api.first.org/data/v1/epss?cve=CVE-2016-9263
epss 0.01241 https://api.first.org/data/v1/epss?cve=CVE-2016-9263
cvssv2 2.6 https://nvd.nist.gov/vuln/detail/CVE-2016-9263
cvssv3 4.7 https://nvd.nist.gov/vuln/detail/CVE-2016-9263
Reference id Reference type URL
https://api.first.org/data/v1/epss?cve=CVE-2016-9263
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9263
https://opnsec.com/2017/10/cve-2016-9263-unpatched-xsf-vulnerability-in-wordpress/
http://www.securityfocus.com/bid/101294
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*
CVE-2016-9263 https://nvd.nist.gov/vuln/detail/CVE-2016-9263
No exploits are available.
Vector: AV:N/AC:H/Au:N/C:N/I:P/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2016-9263
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:R/S:C/C:L/I:L/A:N Found at https://nvd.nist.gov/vuln/detail/CVE-2016-9263
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 0.79209
EPSS Score 0.01241
Published At April 1, 2026, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2026-04-01T16:32:14.445093+00:00 Debian Oval Importer Import https://www.debian.org/security/oval/oval-definitions-bullseye.xml.bz2 38.0.0