What’s Vulnerable › Vulnerabilities

CVE-2016-9263

• Severity: medium (CVSS 4.7 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-10-12 · updated 2026-06-17
• Weakness: CWE-20

Description

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.

Affected products

• WordPress: through 4.8.2

References

• http://www.securityfocus.com/bid/101294
• https://opnsec.com/2017/10/cve-2016-9263-unpatched-xsf-vulnerability-in-wordpress/
• http://www.securityfocus.com/bid/101294
• https://opnsec.com/2017/10/cve-2016-9263-unpatched-xsf-vulnerability-in-wordpress/

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