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Vulnerability record · CVE-2016-4567 · published 22 May 2016

CVE-2016-4567: Mediaelementjs mediaelement.js cross-site scripting vulnerability

Mediaelementjs · Mediaelement.Js

Cross-site scripting (XSS) vulnerability in flash/FlashMediaElement.as in MediaElement.js before 2.21.0, as used in WordPress before 4.5.2, allows remote attackers to inject arbitrary web script or HTML via an obfuscated form of the jsinitfunction parameter, as demonstrated by "jsinitfunctio%gn."

6.1 CVSS 3.0 Medium EPSS 7.4% · top 5.8% CWE-79 · Cross-site scripting
6.1CVSS 3.0 base score, v2 4.3
7.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
18References
17 Jun 2026Last modified by NVD

Description

Cross-site scripting (XSS) vulnerability in flash/FlashMediaElement.as in MediaElement.js before 2.21.0, as used in WordPress before 4.5.2, allows remote attackers to inject arbitrary web script or HTML via an obfuscated form of the jsinitfunction parameter, as demonstrated by "jsinitfunctio%gn."

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

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2016-4567), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.