---
title: "CVE-2016-9902\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-2016-9902?format=md
keywords: index, follow
---

# CVE-2016-9902

Publication date 13 December 2016

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-2016-9902?format=md#impact-score)

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## Description

The Pocket toolbar button, once activated, listens for events fired from
it's own pages but does not verify the origin of incoming events. This
allows content from other origins to fire events and inject content and
commands into the Pocket context. Note: this issue does not affect users
with e10s enabled. This vulnerability affects Firefox ESR < 45.6 and
Firefox < 50.1.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| firefox | 16.10 yakkety | Fixed 50.1.0+build2-0ubuntu0.16.10.1 |
| 16.04 LTS xenial | Fixed 50.1.0+build2-0ubuntu0.16.04.1 |
| 14.04 LTS trusty | Fixed 50.1.0+build2-0ubuntu0.14.04.1 |
| 12.04 LTS precise | Fixed 50.1.0+build2-0ubuntu0.12.04.1 |
| thunderbird | 16.10 yakkety | Not affected |
| 16.04 LTS xenial | 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**

7.5 · High

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Privileges required | None |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | None |
  | Integrity impact | High |
  | 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:N/I:H/A:N

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9902)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2016-9902)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2016-9902)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2016-9902)

### Related Ubuntu Security Notices (USN)

+ [USN-3155-1](https://usn.ubuntu.com/USN-3155-1)
+ Firefox vulnerabilities
+ 13 December 2016

### Other references

* <https://www.mozilla.org/en-US/security/advisories/mfsa2016-94/>
* <https://www.cve.org/CVERecord?id=CVE-2016-9902>