---
title: CVE-2016-9459
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-2016-9459
---

# CVE-2016-9459

Publication date 28 March 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-2016-9459#impact-score)

Toggle side navigation

## Description

Nextcloud Server before 9.0.52 & ownCloud Server before 9.0.4 are
vulnerable to a log pollution vulnerability potentially leading to a local
XSS. The download log functionality in the admin screen is delivering the
log in JSON format to the end-user. The file was delivered with an
attachment disposition forcing the browser to download the document.
However, Firefox running on Microsoft Windows would offer the user to open
the data in the browser as an HTML document. Thus any injected data in the
log would be executed.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| nextcloud | 18.10 cosmic | Not in release |
| 18.04 LTS bionic | Not in release |
| 17.10 artful | Not in release |
| 17.04 zesty | Not in release |
| 16.10 yakkety | Not in release |
| 16.04 LTS xenial | Not in release |
| 14.04 LTS trusty | Not in release |
| 12.04 LTS precise | Not in release |
| owncloud | 18.10 cosmic | Not in release |
| 18.04 LTS bionic | Not in release |
| 17.10 artful | Not in release |
| 17.04 zesty | Not in release |
| 16.10 yakkety | Not in release |
| 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-2016-9459)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2016-9459)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2016-9459)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2016-9459)

### Other references

* <https://github.com/nextcloud/server/commit/94975af6db1551c2d23136c2ea22866a5b416070>
* <https://github.com/owncloud/core/commit/044ee072a647636b1a17c89265c7233b35371335>
* <https://github.com/owncloud/core/commit/b7fa2c5dc945b40bc6ed0a9a0e47c282ebf043e1>
* <https://github.com/owncloud/core/commit/efa35d621dc7ff975468e636a5d1c153511296dc>
* <https://hackerone.com/reports/146278>
* <https://nextcloud.com/security/advisory/?id=nc-sa-2016-002>
* <https://owncloud.org/security/advisory?id=oc-sa-2016-012>
* <https://www.cve.org/CVERecord?id=CVE-2016-9459>