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CVE-2021-39353— Easy Registration Forms <= 2.1.1 Cross-Site Request Forgery to Stored Cross-Site Scripting

Quick assessment

Affected
Easy Registration Forms Easy Registration Forms
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是WordPress（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 存在跨站请求伪造漏洞，该漏洞源于WEB应用未充分验证请求是否来自可信用户。攻击者可利用该漏洞通过受影响客户端向服务器发送非预期的请求。

CVSS 8.8 · High EPSS 0.70% · P50

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-39353

Vulnerability Information
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Vulnerability Title
Easy Registration Forms <= 2.1.1 Cross-Site Request Forgery to Stored Cross-Site Scripting
Source: CVE Program / CVE List V5
Vulnerability Description
The Easy Registration Forms WordPress plugin is vulnerable to Cross-Site Request Forgery due to missing nonce validation via the ajax_add_form function found in the ~/includes/class-form.php file which made it possible for attackers to inject arbitrary web scripts in versions up to, and including 2.1.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨站请求伪造(CSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress 跨站请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress是WordPress（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 存在跨站请求伪造漏洞，该漏洞源于WEB应用未充分验证请求是否来自可信用户。攻击者可利用该漏洞通过受影响客户端向服务器发送非预期的请求。
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
Easy Registration Forms Easy Registration Forms 2.1.1 ~ 2.1.1 -

II. Public POCs for CVE-2021-39353

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III. Intelligence Information for CVE-2021-39353

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Patches & Fixes for CVE-2021-39353 (1)

Vendor Advisories for CVE-2021-39353 (1)

IV. Related Vulnerabilities

Same product: Easy Registration Forms
Same weakness: CWE-352

V. Comments for CVE-2021-39353

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