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CVE-2016-4567

24
FAUCET Score

CVE-2016-4567 describes a cross-site scripting (XSS) vulnerability in MediaElement.js versions prior to 2.21.0, specifically impacting its use within WordPress installations before version 4.5.2. This flaw allows remote attackers to inject arbitrary web scripts or HTML by manipulating the 'jsinitfunction' parameter through obfuscation. Rated as Medium severity (CVSS 6.1), exploitation requires user interaction and could lead to limited impact on confidentiality and integrity. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.20.1CPE matchmatch criteria
cpe:2.3:a:mediaelementjs:mediaelement.js:*:*:*:*:*:*:*:*
<= 4.5.1CPE matchmatch criteria
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
6.40%
Probability of exploitation in next 30 days
EPSS Percentile
92.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0640 is in the 97th percentile among its peer group of 26,209 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

composerpatch availablevia ghsa
Product: contao-components/mediaelementFixed in: 2.21.1
composerpatch availablevia ghsa
Product: contao/coreFixed in: 3.5.15
github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: mediaelementFixed in: 2.11.1

Vendor Advisories (1)

npmGHSA-277w-qpxr-2549medium

MediaElement Vulnerable to Reflected XSS

May 17, 2022

References

codex.wordpress.org / Version_4.5.2
PatchVendor Advisory
core.trac.wordpress.org / changeset/37371
Patch
gist.github.com / cure53/df34ea68c26441f3ae98f821ba1feb9c
Third Party Advisory
github.com / johndyer/mediaelement/blob/master/changelog.md
PatchVendor Advisory
github.com / johndyer/mediaelement/commit/34834eef8ac830b9145df169ec22016a4350f06e
PatchVendor Advisory
wordpress.org / news/2016/05/wordpress-4-5-2
PatchVendor Advisory
wpvulndb.com / vulnerabilities/8488
Third Party Advisory
openwall.com / lists/oss-security/2016/05/07/2
securitytracker.com / id/1035818
Third Party AdvisoryVDB Entry