---
title: "CVE-2016-6333\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-2016-6333?format=md
keywords: index, follow
---

# CVE-2016-6333

Publication date 20 April 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-2016-6333?format=md#impact-score)

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## Description

Cross-site scripting (XSS) vulnerability in the CSS user subpage preview
feature in MediaWiki before 1.23.15, 1.26.x before 1.26.4, and 1.27.x
before 1.27.1 allows remote attackers to inject arbitrary web script or
HTML via the edit box in Special:MyPage/common.css.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| mediawiki | 19.04 disco | Not affected |
| 18.10 cosmic | Not affected |
| 18.04 LTS bionic | Not affected |
| 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 | Not in release |
| 14.04 LTS trusty | Not in release |
| 12.04 LTS precise | Ignored end of life |

---

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

## 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-2016-6333)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2016-6333)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2016-6333)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2016-6333)

### Other references

* <https://lists.wikimedia.org/pipermail/wikitech-l/2016-August/086342.html>
* <https://www.cve.org/CVERecord?id=CVE-2016-6333>