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CVE-2026-53674— BuddyPress 14.4.0 REGEXP Injection via @Mention Username Resolution

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，该漏洞源于活动提及解析器中的正则表达式注入，当启用用户名兼容模式时，攻击者可以通过构造包含正则表达式元字符的提及名称操纵REGEXP数据库子句，攻击者可以提交@提及

CVSS 7.1 · High EPSS 0.66% · P50

Affected Version Matrix 1

VendorProduct Version RangeStatus
BuddyPress BuddyPress ≤ 14.4.0 affected
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I. Basic Information for CVE-2026-53674

Vulnerability Information
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Vulnerability Title
BuddyPress 14.4.0 REGEXP Injection via @Mention Username Resolution
Source: CVE Program / CVE List V5
Vulnerability Description
BuddyPress 14.4.0 contains a regular expression injection vulnerability in the activity mention resolver that, when username compatibility mode is enabled, allows attackers to manipulate a REGEXP database clause by crafting mention names containing regex metacharacters. Attackers can submit @mentions whose metacharacters pass through esc_sql unescaped and are inserted into an unprepared REGEXP query against the users table, enabling boolean-based inference of usernames and denial of service through catastrophic backtracking.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
数据查询逻辑中特殊元素的不当中和
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，该漏洞源于活动提及解析器中的正则表达式注入，当启用用户名兼容模式时，攻击者可以通过构造包含正则表达式元字符的提及名称操纵REGEXP数据库子句，攻击者可以提交@提及
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-2026-53674

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III. Intelligence Information for CVE-2026-53674

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Vendor Advisories for CVE-2026-53674 (1)

Vendor Pages for CVE-2026-53674 (2)

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

CVE-2026-53673 8.1 HIGH BuddyPress 14.4.0 Private Message IDOR via REST API user_id Parameter
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-943

V. Comments for CVE-2026-53674

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