Improper Access Control Affecting xo-server package, versions *


Severity

Recommended
0.0
medium
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

Exploit Maturity
Proof of concept
EPSS
0.06% (27th percentile)

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  • Snyk IDSNYK-JS-XOSERVER-1316690
  • published14 Jul 2021
  • disclosed13 Jul 2021
  • credit@r3naissance

Introduced: 13 Jul 2021

CVE-2021-36383  (opens in a new tab)
CWE-284  (opens in a new tab)

How to fix?

There is no fixed version for xo-server.

Overview

Affected versions of this package are vulnerable to Improper Access Control. Permissions enforcement through WebSockets are not thoroughly checked and can lead to an unprivileged user to obtain data only accessible by admin, such as VMs, Backups, Audit, Users, and Groups.

The WebSockets that control the application API allow access to certain elements based purely on the response. For example, an attacker could manipulate the response of the resourceSet.getAll method to cause the UI to expose admin-level data.

CVSS Scores

version 3.1