---
title: "CVE-2017-9781\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2017-9781?format=md
keywords: index, follow
---

# CVE-2017-9781

Publication date 21 June 2017

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**6.1 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2017-9781?format=md#impact-score)

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## Description

A cross site scripting (XSS) vulnerability exists in Check\_MK versions
1.4.0x prior to 1.4.0p6, allowing an unauthenticated remote attacker to
inject arbitrary HTML or JavaScript via the \_username parameter when
attempting authentication to webapi.py, which is returned unencoded with
content type text/html.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2017-9781?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| check-mk | 22.04 LTS jammy | Not in release |
| 21.10 impish | Not in release |
| 21.04 hirsute | Not in release |
| 20.10 groovy | Not in release |
| 20.04 LTS focal | Not in release |
| 19.10 eoan | Ignored end of life |
| 19.04 disco | Ignored end of life |
| 18.10 cosmic | Ignored end of life |
| 18.04 LTS bionic | Fixed 1.2.8p16-1ubuntu0.2 |
| 17.10 artful | Ignored end of life |
| 17.04 zesty | Ignored end of life |
| 16.10 yakkety | Ignored end of life |
| 16.04 LTS xenial | Fixed 1.2.6p12-1ubuntu0.16.04.1+esm1  Ubuntu Pro |
| 14.04 LTS trusty | Not in release |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

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## Notes

---

### [0xnishit](https://launchpad.net/~0xnishit)

fix 1.4.0p26: https://github.com/tribe29/checkmk/commit/55b67fe59fdf06d6ceaf0d3ae53f73dd4cdf4161
fix 1.2.8p27: https://github.com/tribe29/checkmk/commit/444b30ccd955467da7a88a5321fc54b042500292

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

6.1 · Medium

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Privileges required | None |
  | User interaction | Required |
  | Scope | Changed |
  | Confidentiality impact | Low |
  | Integrity impact | Low |
  | Availability impact | None |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 6.1 · Medium |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-9781)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2017-9781)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2017-9781)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2017-9781)

### Related Ubuntu Security Notices (USN)

+ [USN-5527-1](https://usn.ubuntu.com/USN-5527-1)
+ Checkmk vulnerabilities
+ 20 July 2022

+ [USN-5527-2](https://usn.ubuntu.com/USN-5527-2)
+ Checkmk vulnerabilities
+ 20 July 2022

### Other references

* <http://git.mathias-kettner.de/git/?p=check_mk.git;a=blob;f=.werks/4757;hb=c248f0b6ff7b15ced9f07a3df8a80fad656ea5b1>
* <https://www.cve.org/CVERecord?id=CVE-2017-9781>