CVE-2021-39356

21.10.2021, 20:15

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.

Cross-site Scripting

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
NIST	NIST	5.5 MEDIUM	NETWORK	LOW	HIGH	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
Wordfence	CNA	5.5 MEDIUM	NETWORK	LOW	HIGH	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
CVE	ADP	---				---
CISA-ADP	ADP	---				---

Base Score

CVSS 3.x

EPSS Score

Percentile: 67%

Vendor	Product	Version
content_staging_project	content_staging	𝑥 ≤ 2.0.1

𝑥

= Vulnerable software versions

Known Exploits!

Common Weakness Enumeration

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

References

https://github.com/BigTiger2020/word-press/blob/main/Content%20Staging.md

https://plugins.trac.wordpress.org/browser/content-staging/trunk/templates/settings.php

https://wordfence.com/vulnerability-advisories/#CVE-2021-39356

https://github.com/BigTiger2020/word-press/blob/main/Content%20Staging.md

https://plugins.trac.wordpress.org/browser/content-staging/trunk/templates/settings.php

https://wordfence.com/vulnerability-advisories/#CVE-2021-39356