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CVE-2026-53673— BuddyPress 14.4.0 Private Message IDOR via REST API user_id Parameter

Quick assessment

Affected
BuddyPress BuddyPress
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。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin BuddyPress 14.4.0版本存在安全漏洞，该漏洞源于消息REST API中存在不安全的直接对象引用，可能导致经过身份验证的攻击者通过提供user_id参数访问任意私人消息线程，攻击者可以传递其他用户的标识符

CVSS 8.1 · High EPSS 0.52% · P42

Affected Version Matrix 1

VendorProduct Version RangeStatus
BuddyPress BuddyPress ≤ 14.4.0 affected
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I. Basic Information for CVE-2026-53673

Vulnerability Information
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Vulnerability Title
BuddyPress 14.4.0 Private Message IDOR via REST API user_id Parameter
Source: CVE Program / CVE List V5
Vulnerability Description
BuddyPress 14.4.0 contains an insecure direct object reference vulnerability in the messages REST API that allows authenticated attackers to access arbitrary private message threads by supplying a user_id parameter in the request. Attackers can pass another user's identifier to the get_item_permissions_check method, which validates the supplied user_id instead of the logged-in user and is reused by the update and delete handlers, to read, reply to, or delete any user's private messages.
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
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress plugin BuddyPress 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。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin BuddyPress 14.4.0版本存在安全漏洞，该漏洞源于消息REST API中存在不安全的直接对象引用，可能导致经过身份验证的攻击者通过提供user_id参数访问任意私人消息线程，攻击者可以传递其他用户的标识符
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
BuddyPress BuddyPress 0 ~ 14.4.0 -

II. Public POCs for CVE-2026-53673

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III. Intelligence Information for CVE-2026-53673

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Vendor Advisories for CVE-2026-53673 (1)

Vendor Pages for CVE-2026-53673 (2)

Same Patch Batch · BuddyPress · 2026-06-09 · 3 CVEs total

CVE-2026-53674 7.1 HIGH BuddyPress 14.4.0 REGEXP Injection via @Mention Username Resolution
CVE-2026-53675 4.3 MEDIUM BuddyPress 14.4.0 Friends List IDOR via REST API

IV. Related Vulnerabilities

Same product: BuddyPress
Same vendor: BuddyPress
Same weakness: CWE-639

V. Comments for CVE-2026-53673

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