---
title: "CVE-2016-1937\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-2016-1937?format=md
keywords: index, follow
---

# CVE-2016-1937

Publication date 26 January 2016

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-2016-1937?format=md#impact-score)

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## Description

The protocol-handler dialog in Mozilla Firefox before 44.0 allows remote
attackers to conduct clickjacking attacks via a crafted web site that
triggers a single-click action in a situation where a double-click action
was intended.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| firefox | 15.10 wily | Fixed 44.0+build3-0ubuntu0.15.10.1 |
| 15.04 vivid | Fixed 44.0+build3-0ubuntu0.15.04.1 |
| 14.04 LTS trusty | Fixed 44.0+build3-0ubuntu0.14.04.1 |
| 12.04 LTS precise | Fixed 44.0+build3-0ubuntu0.12.04.1 |
| thunderbird | 15.10 wily | Not affected |
| 15.04 vivid | Not affected |
| 14.04 LTS trusty | Not in release |
| 12.04 LTS precise | Not affected |

---

* [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-2016-1937)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2016-1937)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2016-1937)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2016-1937)

### Related Ubuntu Security Notices (USN)

+ [USN-2880-1](https://usn.ubuntu.com/USN-2880-1)
+ Firefox vulnerabilities
+ 27 January 2016

### Other references

* <https://www.mozilla.org/en-US/security/advisories/mfsa2016-06/>
* <https://www.cve.org/CVERecord?id=CVE-2016-1937>