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CVE-2021-21389— BuddyPress privilege escalation via REST API

Quick assessment

Affected
buddypress BuddyPress
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（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 BuddyPress 7.2.1 存在安全漏洞，该漏洞源于非特权的普通用户可以通过利用REST API成员端点中的问题获得管理员权限。

CVSS 8.1 · High EPSS 13.52% · P96

Public Exploits 1

Nuclei · 1 CVE-2021-21389.yaml [template]

Possible ATT&CK Techniques 1 AI

T1136.003 · Cloud Account
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I. Basic Information for CVE-2021-21389

Vulnerability Information
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Vulnerability Title
BuddyPress privilege escalation via REST API
Source: CVE Program / CVE List V5
Vulnerability Description
BuddyPress is an open source WordPress plugin to build a community site. In releases of BuddyPress from 5.0.0 before 7.2.1 it's possible for a non-privileged, regular user to obtain administrator rights by exploiting an issue in the REST API members endpoint. The vulnerability has been fixed in BuddyPress 7.2.1. Existing installations of the plugin should be updated to this version to mitigate the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress 安全漏洞
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 BuddyPress 7.2.1 存在安全漏洞，该漏洞源于非特权的普通用户可以通过利用REST API成员端点中的问题获得管理员权限。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
buddypress BuddyPress >= 5.0.0, < 7.2.1 -

II. Public POCs for CVE-2021-21389

# POC Description Source Link Shenlong Link
1 BuddyPress is an open source WordPress plugin to build a community site. In releases of BuddyPress from 5.0.0 before 7.2.1 it's possible for a non-privileged, regular user to obtain administrator rights by exploiting an issue in the REST API members endpoint. The vulnerability has been fixed in BuddyPress 7.2.1. Existing installations of the plugin should be updated to this version to mitigate the issue. https://github.com/HoangKien1020/CVE-2021-21389 POC Details
2 경희대 졸업프로젝트 https://github.com/mynameSumin/CVE-2021-21389 POC Details
3 WordPress BuddyPress before version 7.2.1 is susceptible to a privilege escalation vulnerability that can be leveraged to perform remote code execution. https://github.com/projectdiscovery/nuclei-templates/blob/main/http/cves/2021/CVE-2021-21389.yaml POC Details
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III. Intelligence Information for CVE-2021-21389

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Vendor Advisories for CVE-2021-21389 (1)

Other References for CVE-2021-21389 (2)

IV. Related Vulnerabilities

Same product: BuddyPress
Same vendor: buddypress
Same weakness: CWE-863

V. Comments for CVE-2021-21389

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