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CVE-2016-4566

23
FAUCET Score

CVE-2016-4566 describes a cross-site scripting (XSS) vulnerability in the plupload.flash.swf component of Plupload versions prior to 2.1.9, which is also utilized in WordPress before version 4.5.2. This flaw allows remote attackers to inject arbitrary web script or HTML through a Same-Origin Method Execution (SOME) attack. Rated as MEDIUM severity with a CVSS score of 6.1, the vulnerability requires user interaction and could lead to limited confidentiality and integrity impacts. There is no evidence of active exploitation, nor are there publicly available exploit modules in Metasploit or Nuclei, and it has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.5.1CPE matchmatch criteria
cpe:2.3:a:wordpress:wordpress:*:*:*:*:*:*:*:*
<= 2.1.8CPE matchmatch criteria
cpe:2.3:a:plupload:plupload:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
2.7
CvssVersion
3.0

Exploit Intelligence

EPSS Score
5.36%
Probability of exploitation in next 30 days
EPSS Percentile
91.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0536 is in the 96th percentile among its peer group of 26,219 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

codex.wordpress.org / Version_4.5.2
Patch
core.trac.wordpress.org / changeset/37382
Patch
gist.github.com / cure53/09a81530a44f6b8173f545accc9ed07e
Third Party Advisory
wordpress.org / news/2016/05/wordpress-4-5-2
PatchVendor Advisory
wpvulndb.com / vulnerabilities/8489
Third Party Advisory
openwall.com / lists/oss-security/2016/05/07/2
plupload.com / punbb/viewtopic.php
Vendor Advisory
securitytracker.com / id/1035818
Third Party AdvisoryVDB Entry