---
title: "CVE-2020-25828\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-2020-25828?format=md
keywords: index, follow
---

# CVE-2020-25828

Publication date 27 September 2020

Last updated 26 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**6.1 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2020-25828?format=md#impact-score)

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## Description

An issue was discovered in MediaWiki before 1.31.10 and 1.32.x through
1.34.x before 1.34.4. The non-jqueryMsg version of mw.message().parse()
doesn't escape HTML. This affects both message contents (which are
generally safe) and the parameters (which can be based on user input).
(When jqueryMsg is loaded, it correctly accepts only whitelisted tags in
message contents, and escapes all parameters. Situations with an unloaded
jqueryMsg are rare in practice, but can for example occur for
Special:SpecialPages on a wiki with no extensions installed.)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| mediawiki | 26.04 LTS resolute | Not affected |
| 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 | Ignored end of standard support, was needs-triage |
| 18.04 LTS bionic | Ignored end of standard support, was needs-triage |
| 16.04 LTS xenial | Not in release |
| 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)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

6.1 · Medium

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 6.1 · Medium |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25828)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2020-25828)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2020-25828)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2020-25828)

### Other references

* <https://lists.wikimedia.org/pipermail/wikitech-l/2020-September/093888.html>
* <https://phabricator.wikimedia.org/T115888>
* <https://lists.wikimedia.org/pipermail/mediawiki-announce>
* <https://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048480.html>
* <https://lists.wikimedia.org/pipermail/mediawiki-l/2020-September/048488.html>
* <https://www.cve.org/CVERecord?id=CVE-2020-25828>