MediaElement Vulnerable to Reflected XSS

Impact

Cross-site scripting (XSS) vulnerability in flash/FlashMediaElement.swf 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 packages

Start with the recorded fix for your release branch. Check your installed version and test compatibility before upgrading. Fixing this advisory does not rule out other vulnerabilities in the release.

Original source description

References

• Security advisory nvd.nist.gov/vuln/detail/CVE-2016-4567
• Patch github.com/johndyer/mediaelement/commit/34834eef8ac830b9145df169ec22016a4350f06e
• Patch github.com/mediaelement/mediaelement/commit/34834eef8ac830b9145df169ec22016a4350f06e
• Source reference codex.wordpress.org/Version_4.5.2
• Source reference contao.org/en/news/contao-3_5_15.html
• Patch core.trac.wordpress.org/changeset/37371
• Source reference gist.github.com/cure53/df34ea68c26441f3ae98f821ba1feb9c
• Security advisory github.com/FriendsOfPHP/security-advisories/blob/master/contao-components/mediaelement/CVE-2016-4567.yaml
• Security advisory github.com/FriendsOfPHP/security-advisories/blob/master/contao/core/CVE-2016-4567.yaml
• Release notes github.com/johndyer/mediaelement/blob/master/changelog.md
• Release notes github.com/mediaelement/mediaelement/blob/b992ccf5f0c04a207d98bbb0868420751a61ec90/changelog.md
• Release notes github.com/mediaelement/mediaelement/blob/master/changelog.md
• Security advisory web.archive.org/web/20170205142412/http://www.securitytracker.com/id/1035818
• Source reference wordpress.org/news/2016/05/wordpress-4-5-2
• Security advisory wpvulndb.com/vulnerabilities/8488
• Security advisory www.openwall.com/lists/oss-security/2016/05/07/2
• Source reference www.securitytracker.com/id/1035818