CVE-2026-53674
High · 7.1CVSS
7.1
EPSS
0.7%
Published
Jun 10, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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