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CVE-2026-53674

BuddyPress 14.4.0 REGEXP Injection via @Mention Username Resolution

Published: Jun 9, 2026Updated: Jul 23, 2026 Sources: CVE List NVDCWE-943
7.1HIGH
NVD MITRE
EPSS Score
0.4%
Top 70.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:LI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-943

Affected Products

BuddyPress
oss-project
BuddyPressMixed
Web & CMS Plugins / wordpress-plugin

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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References

https://buddypress.org/
buddypress.org
https://wordpress.org/plugins/buddypress/
wordpress.org
https://www.vulncheck.com/advisories/buddypress-regexp-injection-via-mention-username-resolution
vulncheck.com

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