CVE-2026-53674 — BuddyPress 14.4.0 REGEXP Injection via @Mention Username Resolution
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 m…
Published: 2026-06-09 · CVSS: 7.1 · CVSS 4.0
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 · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7