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Description

The Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to blind SQL Injection via the `order` and `append_where_sql` parameters in all versions up to, and including, 1.6.9.9 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

PUBLISHED Reserved 2025-10-24 | Published 2026-01-14 | Updated 2026-01-14 | Assigner Wordfence




HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Problem types

CWE-89 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Product status

Default status
unaffected

* (semver)
affected

Timeline

2025-10-14:Discovered
2025-10-24:Vendor Notified
2026-01-14:Disclosed

Credits

Angus Girvan finder

References

www.wordfence.com/...-21a4-4573-9840-1d5043781bc0?source=cve

plugins.trac.wordpress.org/changeset/3408539/

cve.org (CVE-2025-12166)

nvd.nist.gov (CVE-2025-12166)

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