CVE-2026-53674: high-severity vulnerability in BuddyPress
BuddyPress 14.4.0 REGEXP Injection via @Mention Username Resolution
Published · Updated
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21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.1epss 0.4%
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:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
BuddyPress · BuddyPressRelated CVEs — BuddyPress
In the same product, most dangerous first.
CVE-2025-62022HIGHWordPress BuddyPress plugin <= 14.3.4 - Broken Access Control vulnerabilityEPSS 0.4%CVE-2026-53673HIGHBuddyPress 14.4.0 Private Message IDOR via REST API user_id ParameterEPSS 0.4%CVE-2026-115965HIGHWordPress BuddyPress plugin <= 14.5.2 - SQL Injection vulnerabilityEPSS 0.3%CVE-2026-53675MEDIUMBuddyPress 14.4.0 Friends List IDOR via REST APIEPSS 0.2%CVE-2026-111850HIGHWordPress BuddyPress plugin <= 14.5.2 - SQL Injection vulnerabilityEPSS 0.2%