---
title: "CVE-2018-5112\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-2018-5112?format=md
keywords: index, follow
---

# CVE-2018-5112

Publication date 23 January 2018

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**7.5 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2018-5112?format=md#impact-score)

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## Description

Development Tools panels of an extension are required to load URLs for the
panels as relative URLs from the extension manifest file but this
requirement was not enforced in all instances. This could allow the
development tools panel for the extension to load a URL that it should not
be able to access, including potentially privileged pages. This
vulnerability affects Firefox < 58.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| firefox | 18.04 LTS bionic | Fixed 59.0.1+build1-0ubuntu1 |
| 17.10 artful | Fixed 58.0+build6-0ubuntu0.17.10.1 |
| 16.04 LTS xenial | Fixed 58.0+build6-0ubuntu0.16.04.1 |
| 14.04 LTS trusty | Fixed 58.0+build6-0ubuntu0.14.04.1 |

---

* [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**

7.5 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.5 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5112)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-5112)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2018-5112)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2018-5112)

### Related Ubuntu Security Notices (USN)

+ [USN-3544-1](https://usn.ubuntu.com/USN-3544-1)
+ Firefox vulnerabilities
+ 24 January 2018

### Other references

* <https://www.mozilla.org/en-US/security/advisories/mfsa2018-02/>
* <https://www.cve.org/CVERecord?id=CVE-2018-5112>