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CVE-2021-36873— WordPress iQ Block Country plugin <= 1.2.11 - Authenticated Persistent Cross-Site Scripting (XSS) vulnerability

Quick assessment

Affected
Webence iQ Block Country
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress是Wordpress基金会的一套使用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 插件是WordPress开源的一个应用插件。 WordPress iQ Block Country plugin 1.2.11及之前版本存在跨站脚本漏洞，攻击者可以利用该漏洞执行JS代码。

CVSS 5.5 · Medium EPSS 1.23% · P67

Public Exploits 1

Nuclei · 1 CVE-2021-36873.yaml [template]

Possible ATT&CK Techniques 1 AI

T1189 · Drive-by Compromise
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I. Basic Information for CVE-2021-36873

Vulnerability Information
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Vulnerability Title
WordPress iQ Block Country plugin <= 1.2.11 - Authenticated Persistent Cross-Site Scripting (XSS) vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Authenticated Persistent Cross-Site Scripting (XSS) vulnerability in WordPress iQ Block Country plugin (versions <= 1.2.11). Vulnerable parameter: &blockcountry_blockmessage.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/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 插件跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress是Wordpress基金会的一套使用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 插件是WordPress开源的一个应用插件。 WordPress iQ Block Country plugin 1.2.11及之前版本存在跨站脚本漏洞，攻击者可以利用该漏洞执行JS代码。
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
Webence iQ Block Country 1.2.11 ~ 1.2.11 -

II. Public POCs for CVE-2021-36873

# POC Description Source Link Shenlong Link
1 WordPress iQ Block Country plugin 1.2.11 and prior contains a cross-site scripting vulnerability. An attacker can execute arbitrary script in the browser of an unsuspecting user in the context of the affected site. This can allow the attacker to steal cookie-based authentication credentials and launch other attacks. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-36873.yaml POC Details
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III. Intelligence Information for CVE-2021-36873

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Vendor Advisories for CVE-2021-36873 (1)

Other References for CVE-2021-36873 (1)

IV. Related Vulnerabilities

Same product: iQ Block Country
Same weakness: CWE-79

V. Comments for CVE-2021-36873

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