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CVE-2021-39356 Details

Description

The Content Staging WordPress plugin is vulnerable to Stored Cross-Site Scripting due to insufficient input validation and escaping via several parameters that are echo'd out via the ~/templates/settings.php file which allowed attackers with administrative user access to inject arbitrary web scripts, in versions up to and including 2.0.1. This affects multi-site installations where unfiltered_html is disabled for administrators, and sites where unfiltered_html is disabled.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:4.8 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

CNA: [email protected]CVSS-B:5.5 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/BigTiger2020/word-press/blob/main/Content%20Staging.md	CVE	ExploitThird Party Advisory
https://plugins.trac.wordpress.org/browser/content-staging/trunk/templates/settings.php	CVE	Third Party Advisory
https://wordfence.com/vulnerability-advisories/#CVE-2021-39356	CVE	Third Party Advisory
https://github.com/BigTiger2020/word-press/blob/main/Content%20Staging.md	[email protected]	ExploitThird Party Advisory
https://plugins.trac.wordpress.org/browser/content-staging/trunk/templates/settings.php	[email protected]	Third Party Advisory
https://wordfence.com/vulnerability-advisories/#CVE-2021-39356	[email protected]	Third Party Advisory

see all 6 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-79	Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')	[email protected]

Affected Products

Product	Versions
content staging project content staging	<= 2.0.1
CPE cpe:2.3:a:content_staging_project:content_staging::::::wordpress::* Remediation No remediation found in references.

Change History

5 change records found show changes

Date	Action	Recorded By
Jun 17, 2026	CVE Modified	[email protected]
Jun 17, 2026	CVE Modified	CISA-ADP
Nov 21, 2024	CVE Modified	CVE
May 14, 2024	CVE Modified	[email protected]
Oct 27, 2021	Initial Analysis	[email protected]