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CVE-2021-36833— WordPress MC4WP plugin <= 4.8.6 - Authenticated Stored Cross-Site Scripting (XSS) vulnerability

Quick assessment

Affected
ibericode MC4WP: Mailchimp for WordPress
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台支持在PHP和MySQL的服务器上架设个人博客网站。WordPress plugin是一个应用插件。 WordPress plugin MC4WP 4.8.6之前版本存在跨站脚本漏洞，经过身份验证的攻击者利用该漏洞可进行存储的跨站点脚本(XSS)攻击。

CVSS 4.8 · Medium EPSS 0.52% · P42

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript
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I. Basic Information for CVE-2021-36833

Vulnerability Information
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Vulnerability Title
WordPress MC4WP plugin <= 4.8.6 - Authenticated Stored Cross-Site Scripting (XSS) vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Authenticated (admin or higher user role) Stored Cross-Site Scripting (XSS) vulnerability in ibericode's MC4WP plugin <= 4.8.6 at WordPress.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress plugin MC4WP跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台支持在PHP和MySQL的服务器上架设个人博客网站。WordPress plugin是一个应用插件。 WordPress plugin MC4WP 4.8.6之前版本存在跨站脚本漏洞，经过身份验证的攻击者利用该漏洞可进行存储的跨站点脚本(XSS)攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ibericode MC4WP: Mailchimp for WordPress <= 4.8.6 ~ 4.8.6 -

II. Public POCs for CVE-2021-36833

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III. Intelligence Information for CVE-2021-36833

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Vendor Advisories for CVE-2021-36833 (1)

Other References for CVE-2021-36833 (1)

IV. Related Vulnerabilities

Same product: MC4WP: Mailchimp for WordPress
Same vendor: ibericode
Same weakness: CWE-79

V. Comments for CVE-2021-36833

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