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CVE-2023-0556 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:6.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

CNA: [email protected]CVSS-B:9.8 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://plugins.trac.wordpress.org/browser/contentstudio/tags/1.2.1/contentstudio-plugin.php#L517	CVE	ExploitThird Party Advisory
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=2851006%40contentstudio%2Ftrunk&old=2844028%40contentstudio%2Ftrunk&sfp_email=&sfph_mail=	CVE	PatchThird Party Advisory
https://www.wordfence.com/threat-intel/vulnerabilities/id/52db8d41-859a-4d68-8b83-3d3af8f1bf64	CVE	Third Party Advisory
https://plugins.trac.wordpress.org/browser/contentstudio/tags/1.2.1/contentstudio-plugin.php#L517	[email protected]	ExploitThird Party Advisory
https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&new=2851006%40contentstudio%2Ftrunk&old=2844028%40contentstudio%2Ftrunk&sfp_email=&sfph_mail=	[email protected]	PatchThird Party Advisory
https://www.wordfence.com/threat-intel/vulnerabilities/id/52db8d41-859a-4d68-8b83-3d3af8f1bf64?source=cve	[email protected]

see all 6 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-862	Missing Authorization	[email protected]

Affected Products

Product	Versions
contentstudio contentstudio	< 1.2.6
CPE cpe:2.3:a:contentstudio:contentstudio::::::wordpress::* Remediation No remediation found in references.

Change History

7 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Apr 8, 2026	CVE Modified	[email protected]
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Nov 7, 2023	CVE Modified	[email protected]
Feb 6, 2023	Initial Analysis	[email protected]