CVE-2016-9263

Name: CVE-2016-9263
Creator: NVD / NIST
Published: 2017-10-12T16:29:00.247+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 2.55%

Last modified Jun 17, 2026

CVE-2016-9263 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 2.55% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

2.55%

83.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Wordpress	Wordpress	<= 4.8.2

References

http://www.securityfocus.com/bid/101294Third Party Advisory, VDB Entry
https://opnsec.com/2017/10/cve-2016-9263-unpatched-xsf-vulnerability-in-wordpress/Mitigation, Third Party Advisory
http://www.securityfocus.com/bid/101294Third Party Advisory, VDB Entry
https://opnsec.com/2017/10/cve-2016-9263-unpatched-xsf-vulnerability-in-wordpress/Mitigation, Third Party Advisory

Timeline

Published: Oct 12, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-9263?

How severe is CVE-2016-9263?

Severity scoring for CVE-2016-9263 is pending analysis. The EPSS model estimates a 2.55% probability of exploitation in the next 30 days.

How do I fix CVE-2016-9263?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-9263?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST