WordPress YITH Maintenance Mode plugin <= 1.3.8 - Multiple Authenticated Stored Cross-Site Scripting (XSS) vulnerabilities

yith-maintenance-mode

Software
YITH Maintenance Mode
Vulnerable Versions
<= 1.3.8
Fixed in version
1.4.0
CVE
CVE-2021-36845
Classification
Cross Site Scripting (XSS)
OWASP Top 10
A7: Cross-Site Scripting (XSS)
Disclosure Date
2021-09-23
CVSS 3.0 score

6.9

Medium

Requires high privilege user authentication like admin.

Are your websites subject to this vulnerability?

Details

Multiple Authenticated Stored Cross-Site Scripting (XSS) vulnerabilities discovered by Vlad Visse (Patchstack) in WordPress YITH Maintenance Mode plugin (versions <= 1.3.8). Additionally, there are 46 additional parameters fixed that were missed by updating from vulnerable version 1.3.7 to 1.3.8 reported by Asif Nawaz Minhas (Patchstack Red Team).

Solution

Update the WordPress YITH Maintenance Mode plugin to the latest available version (at least 1.4.0).

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