---
title: "CVE-2018-18645\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-2018-18645?format=md
keywords: index, follow
---

# CVE-2018-18645

Publication date 4 December 2018

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**4.3 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2018-18645?format=md#impact-score)

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## Description

An issue was discovered in GitLab Community and Enterprise Edition before
11.2.7, 11.3.x before 11.3.8, and 11.4.x before 11.4.3. It allows for
Information Exposure via unsubscribe links in email replies.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2018-18645?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| gitlab | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 22.04 LTS jammy | Not in release |
| 21.10 impish | Not in release |
| 21.04 hirsute | Not in release |
| 20.10 groovy | Not in release |
| 20.04 LTS focal | Not in release |
| 19.10 eoan | Not in release |
| 19.04 disco | Not in release |
| 18.10 cosmic | Not in release |
| 18.04 LTS bionic | Not in release |
| 16.04 LTS xenial | Ignored end of standard support, was needed |
| 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)

## Notes

---

### [msalvatore](https://launchpad.net/~msalvatore)

Affects all versions of GitLab CE/EE

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

4.3 · Medium

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 4.3 · Medium |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-18645)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-18645)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2018-18645)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2018-18645)

### Other references

* <https://about.gitlab.com/2018/10/29/security-release-gitlab-11-dot-4-dot-3-released/>
* <https://www.cve.org/CVERecord?id=CVE-2018-18645>