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CVE-2021-34626— WP Upload Restriction <= 2.2.3 - Missing Access Control in deleteCustomType function

Quick assessment

Affected
WP Upload Restriction WP Upload Restriction
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 WP Upload Restriction 2.2.3及之前版本存在安全漏洞，低级身份验证的用户可以删除管理员添加的自定义扩展。

CVSS 4.3 · Medium EPSS 0.69% · P50

Possible ATT&CK Techniques 1 AI

T1498 · Network Denial of Service
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I. Basic Information for CVE-2021-34626

Vulnerability Information
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Vulnerability Title
WP Upload Restriction <= 2.2.3 - Missing Access Control in deleteCustomType function
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability in the deleteCustomType function of the WP Upload Restriction WordPress plugin allows low-level authenticated users to delete custom extensions added by administrators. This issue affects versions 2.2.3 and prior.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress plugin WP Upload Restriction 安全漏洞
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 WP Upload Restriction 2.2.3及之前版本存在安全漏洞，低级身份验证的用户可以删除管理员添加的自定义扩展。
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
WP Upload Restriction WP Upload Restriction 2.2.3 ~ 2.2.3 -

II. Public POCs for CVE-2021-34626

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III. Intelligence Information for CVE-2021-34626

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Vendor Advisories for CVE-2021-34626 (1)

Same Patch Batch · WP Upload Restriction · 2021-07-07 · 3 CVEs total

CVE-2021-34625 6.4 MEDIUM WP Upload Restriction <= 2.2.3 - Authenticated Stored Cross-Site Scripting
CVE-2021-34627 4.3 MEDIUM WP Upload Restriction <= 2.2.3 - Missing Access Control in getSelectedMimeTypesByRole func

IV. Related Vulnerabilities

Same product: WP Upload Restriction
Same vendor: WP Upload Restriction
Same weakness: CWE-284

V. Comments for CVE-2021-34626

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