BuddyPress 14.4.0 REGEXP Injection via @Mention Username Resolution_CVE-2026-53674

7.1 / 10

HIGH

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

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.

Basic Information

ID CVE-2026-53674

Source VulnCheck

Published Jun 9, 2026 at 23:44

Affected Product

Vendor BuddyPress

Product BuddyPress

Affected Versions BuddyPress BuddyPress 0

CWE Classification

CWE-943

References

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    "published": "2026-06-09T23:44:21.471Z",
    "modified": "2026-06-09T23:44:21.471Z",
    "type": "cve",
    "title": "BuddyPress 14.4.0 REGEXP Injection via @Mention Username Resolution",
    "source": "VulnCheck",
    "references": "https://buddypress.org/\nhttps://wordpress.org/plugins/buddypress/\nhttps://www.vulncheck.com/advisories/buddypress-regexp-injection-via-mention-username-resolution",
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