CVE-2023-0556 CRITICAL

CVE-2023-0556: ContentStudio <= 1.2.5 - Missing Authorization

Vendor Contentstudio
Product ContentStudio
Weakness CWE-862 · Missing authorization
Published January 27, 2023
Last update April 8, 2026

CVSS base score

9.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

The ContentStudio plugin for WordPress is vulnerable to authorization bypass due to a missing capability check on several functions in versions up to, and including, 1.2.5. This makes it possible for unauthenticated attackers to obtain the blog metadata (via the function cstu_get_metadata) that includes the plugin's contentstudio_token. Knowing this token allows for other interactions with the plugin such as creating posts in versions prior to 1.2.5, which added other requirements to posting and updating.

Key dates

02Disclosure timeline

January 27, 2023 CVE published
April 8, 2026 Record updated

Related vulnerabilities

04Related CVE