---
title: "CVE-2016-9866\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-2016-9866?format=md
keywords: index, follow
---

# CVE-2016-9866

Publication date 11 December 2016

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**9.8 · Critical**

[Score breakdown](https://ubuntu.com/security/CVE-2016-9866?format=md#impact-score)

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## Description

An issue was discovered in phpMyAdmin. When the arg\_separator is different
from its default & value, the CSRF token was not properly stripped from the
return URL of the preference import action. All 4.6.x versions (prior to
4.6.5), 4.4.x versions (prior to 4.4.15.9), and 4.0.x versions (prior to
4.0.10.18) are affected.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| phpmyadmin | 22.04 LTS jammy | Not affected |
| 21.10 impish | Not affected |
| 21.04 hirsute | Not affected |
| 20.10 groovy | Not affected |
| 20.04 LTS focal | Not affected |
| 19.10 eoan | Not in release |
| 19.04 disco | Not affected |
| 18.10 cosmic | Not affected |
| 18.04 LTS bionic | Not affected |
| 17.10 artful | Not affected |
| 17.04 zesty | Not affected |
| 16.10 yakkety | Ignored end of life |
| 16.04 LTS xenial | Fixed 4:4.5.4.1-2ubuntu2.1+esm5  Ubuntu Pro |
| 14.04 LTS trusty | Fixed 4:4.0.10-1ubuntu0.1+esm3  Ubuntu Pro |
| 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)

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## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

9.8 · Critical

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 9.8 · Critical |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-9866)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2016-9866)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2016-9866)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2016-9866)

### Related Ubuntu Security Notices (USN)

+ [USN-4843-1](https://usn.ubuntu.com/USN-4843-1)
+ phpMyAdmin vulnerabilities
+ 16 March 2021

### Other references

* <https://www.phpmyadmin.net/security/PMASA-2016-71/>
* <https://www.cve.org/CVERecord?id=CVE-2016-9866>