---
title: "CVE-2018-9846\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-2018-9846?format=md
keywords: index, follow
---

# CVE-2018-9846

Publication date 7 April 2018

Last updated 30 March 2026

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**8.8 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2018-9846?format=md#impact-score)

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## Description

In Roundcube from versions 1.2.0 to 1.3.5, with the archive plugin enabled
and configured, it's possible to exploit the unsanitized, user-controlled
"\_uid" parameter (in an archive.php
\_task=mail&\_mbox=INBOX&\_action=plugin.move2archive request) to perform an
MX (IMAP) injection attack by placing an IMAP command after a %0d%0a
sequence. NOTE: this is less easily exploitable in 1.3.4 and later because
of a Same Origin Policy protection mechanism.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| roundcube | 25.10 questing | Not affected |
| 25.04 plucky | Not affected |
| 24.10 oracular | Not affected |
| 24.04 LTS noble | Not affected |
| 23.10 mantic | Not affected |
| 23.04 lunar | Not affected |
| 22.10 kinetic | Not affected |
| 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 affected |
| 19.04 disco | Not affected |
| 18.10 cosmic | Not affected |
| 18.04 LTS bionic | Not affected |
| 17.10 artful | Ignored end of life |
| 16.04 LTS xenial | Fixed 1.2~beta+dfsg.1-0ubuntu1+esm7  Ubuntu Pro |
| 14.04 LTS trusty | Not in release |

---

* [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**

8.8 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 8.8 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-9846)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-9846)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2018-9846)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2018-9846)

### Related Ubuntu Security Notices (USN)

+ [USN-8132-1](https://usn.ubuntu.com/USN-8132-1)
+ Roundcube Webmail vulnerabilities
+ 30 March 2026

### Other references

* <https://github.com/roundcube/roundcubemail/issues/6238>
* <https://github.com/roundcube/roundcubemail/commit/e3dd5b66d236867572e68fcb80281e9268a0cfb0 (release-1.3)>
* <https://github.com/roundcube/roundcubemail/issues/6229>
* <https://medium.com/@ndrbasi/cve-2018-9846-roundcube-303097048b0a>
* <https://www.cve.org/CVERecord?id=CVE-2018-9846>