CVE-2020-28645

Publication date 9 February 2021

Last updated 25 August 2025

Ubuntu priority

Cvss 3 Severity Score

Description

Deleting users with certain names caused system files to be deleted. Risk is higher for systems which allow users to register themselves and have the data directory in the web root. This affects ownCloud/core versions < 10.6.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
owncloud	20.10 groovy	Not in release
	20.04 LTS focal	Not in release
	18.04 LTS bionic	Not in release
	16.04 LTS xenial	Not in release
	14.04 LTS trusty	Not in release

How can I get the fixes?
What do statuses mean?

Severity score breakdown

Parameter	Value
Base score	9.1 · Critical
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

References

MITRE
NVD
Launchpad
Debian

Other references

https://owncloud.com/security-advisories/missing-user-validation-leading-to-information-disclosure/
https://www.cve.org/CVERecord?id=CVE-2020-28645