CVE-2016-9263

medium

Published 2017-10-12 · Modified 2026-05-13

💬 Discuss on Community ✚ Propose mitigation

CVSS v3

4.7

CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS v4 NEW

—

not yet in upstream

VIR risk

4.7

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.

Predictions

Exploit likelihood

57%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

OS	Version	Status	Fixed in
debian	bookworm	fixed	`4.1+dfsg-1`
debian	bullseye	fixed	`4.1+dfsg-1`
debian	forky	fixed	`4.1+dfsg-1`
debian	sid	fixed	`4.1+dfsg-1`
debian	trixie	fixed	`4.1+dfsg-1`

Application impact

Vendor	Product	Versions	Fixed
wordpress	wordpress	`{"endIncluding":"4.8.2"}`

References

CWEs

CWE-20

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.