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CVE-2021-39203— Private data disclosure/privilege escalation through the block editor in Wordpress

Quick assessment

Affected
WordPress wordpress-develop
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 5.8 beta 版存在信息泄露漏洞，攻击者可利用该漏洞绕过编辑器中的限制，查看私有数据。这个问题在5.8正式版本中得到了修复。

CVSS 6.8 · Medium EPSS 0.94% · P60
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I. Basic Information for CVE-2021-39203

Vulnerability Information
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Vulnerability Title
Private data disclosure/privilege escalation through the block editor in Wordpress
Source: CVE Program / CVE List V5
Vulnerability Description
WordPress is a free and open-source content management system written in PHP and paired with a MySQL or MariaDB database. In affected versions authenticated users who don't have permission to view private post types/data can bypass restrictions in the block editor under certain conditions. This affected WordPress 5.8 beta during the testing period. It's fixed in the final 5.8 release.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress 信息泄露漏洞
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 5.8 beta 版存在信息泄露漏洞，攻击者可利用该漏洞绕过编辑器中的限制，查看私有数据。这个问题在5.8正式版本中得到了修复。
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
WordPress wordpress-develop 5.8 beta 1 -

II. Public POCs for CVE-2021-39203

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III. Intelligence Information for CVE-2021-39203

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Vendor Advisories for CVE-2021-39203 (1)

Other References for CVE-2021-39203 (1)

Same Patch Batch · WordPress · 2021-09-09 · 4 CVEs total

CVE-2021-39201 7.6 HIGH Authenticated cross-site scripting (XSS) in WordPress editor
CVE-2021-39202 7.6 HIGH WordPress 5.8 beta: Stored Cross-Site Scripting (XSS) vulnerability in widget
CVE-2021-39200 5.3 MEDIUM Information Disclosure in wp_die() via JSONP in wordpress

IV. Related Vulnerabilities

Same product: wordpress-develop
Same vendor: WordPress
Same weakness: CWE-200

V. Comments for CVE-2021-39203

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