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.
History

Wed, 10 Jun 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 10 Jun 2026 03:00:00 +0000

Type Values Removed Values Added
First Time appeared Wordpress
Wordpress wordpress
Vendors & Products Wordpress
Wordpress wordpress

Wed, 10 Jun 2026 00:00:00 +0000

Type Values Removed Values Added
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.
Title BuddyPress 14.4.0 REGEXP Injection via @Mention Username Resolution
First Time appeared Buddypress
Buddypress buddypress
Weaknesses CWE-943
CPEs cpe:2.3:a:buddypress:buddypress:*:*:*:*:*:wordpress:*:*
Vendors & Products Buddypress
Buddypress buddypress
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:H'}

cvssV4_0

{'score': 7.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-06-09T23:44:21.471Z

Updated: 2026-06-10T16:32:21.733Z

Reserved: 2026-06-09T23:14:36.036Z

Link: CVE-2026-53674

cve-icon Vulnrichment

Updated: 2026-06-10T16:08:19.550Z

cve-icon NVD

Status : Deferred

Published: 2026-06-10T00:16:55.190

Modified: 2026-06-10T19:41:25.327

Link: CVE-2026-53674

cve-icon Redhat

No data.