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CVE-2016-4567

• Severity: medium (CVSS 6.1 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 7.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2016-05-22 · updated 2026-06-17
• Weakness: CWE-79

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."

Affected products

• MediaElement.js: through 2.20.1
• WordPress: through 4.5.1

References

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

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