CVE-2026-53674

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.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 4.2

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://buddypress.org/
https://wordpress.org/plugins/buddypress/
https://www.vulncheck.com/advisories/buddypress-regexp-injection-via-mention-username-resolution

Configurations

No configuration.

History

10 Jun 2026, 00:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-10 00:16

Updated : 2026-06-10 00:16

NVD link : CVE-2026-53674

Mitre link : CVE-2026-53674

CVE.ORG link : CVE-2026-53674

JSON object : View

Products Affected

No product.

CWE

CWE-943

Improper Neutralization of Special Elements in Data Query Logic

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