CVE-2016-9263 json
WordPress through 4.8.2, when domain-based flashmediaelement.swf sandboxing is not used, allows remote attackers to conduct cross-domain Fl…
published 2017-10-12 9 y ago modified 2026-06-17 4 mo ago also EUVD-2016-10074
- cvss
- 4.7
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.2%
- EPSS 2.2% chance of exploitation in 30 days, percentile 82%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- wordpress Debian 14, Debian 13, Debian 12 4.1+dfsg-1
debian advisories DEBIAN-CVE-2016-9263
Exploit prediction
2.17% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.0 | 4.7 | CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 2.6 | AV:N/AC:H/Au:N/C:N/I:P/A:N |
Classification
- Weakness
-
- CWE-20 Improper Input Validation
- Technology feeds
References
-
securityfocus.com
/bid/101294
vdb-entry, third-party-advisory
-
opnsec.com
/2017/10/cve-2016-9263-unpatched-xsf-vulnerability-in-wordpress/
mitigation, third-party-advisory
Sources
- CVE List CVE-2016-9263
- NVD CVE-2016-9263
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.