Summary
CVE-2026-18473 is an unauthenticated SQL injection vulnerability in the WP Directory Kit WordPress plugin. Versions before 1.5.5 fail to properly sanitize and escape a user-supplied parameter before using it in a SQL statement, allowing remote attackers to inject arbitrary SQL without authentication. It carries a CVSS v3.1 base score of 9.1 (Critical).
Technical details
- Root cause: the plugin does not properly sanitize and escape the
field_searchparameter before using it in a SQL statement (CWE-89). - Trigger conditions: no authentication is required to reach the vulnerable code path.
- Attack vector: network — the flaw is exploitable remotely by unauthenticated users.
- Impact: injection of arbitrary SQL, enabling unauthorized read and modification of the site’s backend database (high confidentiality and integrity impact).
Affected software
- WP Directory Kit WordPress plugin: all versions before 1.5.5 (confirmed in 1.5.4 and earlier).
- Fixed in version 1.5.5.
Severity
CVSS v3.1 base score: 9.1 (Critical)
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Mitigation and recommended actions
- Immediate: upgrade the WP Directory Kit plugin to version 1.5.5 or later.
- If no patch can be applied immediately: restrict or filter requests to the plugin’s search functionality and deploy a web application firewall rule to block SQL injection payloads targeting the affected parameter.

