---
title: "CVE-2018-20500\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-2018-20500?format=md
keywords: index, follow
---

# CVE-2018-20500

Publication date 17 May 2019

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-2018-20500?format=md#impact-score)

Toggle side navigation

## Description

An insecure permissions issue was discovered in GitLab Community and
Enterprise Edition 9.4 and later but before 11.4.13, 11.5.x before 11.5.6,
and 11.6.x before 11.6.1. The runner registration token in the CI/CD
settings could not be reset. This was a security risk if one of the
maintainers leaves the group and they know the token.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2018-20500?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| gitlab | 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 | Not affected |
| 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 GitLab CE/EE 9.4 and later.

## 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-2018-20500)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-20500)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2018-20500)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2018-20500)

### Other references

* <https://about.gitlab.com/2018/12/31/security-release-gitlab-11-dot-6-dot-1-released/>
* <https://www.cve.org/CVERecord?id=CVE-2018-20500>