Amelia Pro <= 9.9.1 - Unauthenticated SQL Injection via 'tag' Parameter Array Keys
Strategic Overview
- Status
- Patched in 9.9.2
- Affected Plugin
- Booking for Appointments and Events Calendar – Amelia Pro
- Affected Version
4.0 – 9.9.1- CVSS
- 7.5High
- Weakness type
- CWE-89 · Improper Neutralization of Special Elements used in an SQL Command
- CVE
CVE-2026-116751
At a glance
CVE-2026-116751 is a high-severity Improper Neutralization of Special Elements used in an SQL Command vulnerability in the Booking for Appointments and Events Calendar WordPress plugin, affecting versions 4.0 – 9.9.1. It carries a CVSS score of 7.5 (reachable over the network; low attack complexity; high confidentiality impact). Exploitation requires no authentication. The issue is fixed in version 9.9.2; sites on affected versions should update now. Disclosed November 2026, reported by leon figueira.
Vulnerability Overview
The Booking for Appointments and Events Calendar – Amelia Pro plugin for WordPress is vulnerable to time-based SQL Injection via the 'tag[] (array KEYS)' parameter in all versions up to, and including, 9.9.1 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. WordPress's wp_magic_quotes escapes array values but not array keys, meaning attacker-controlled tag[] array keys reach EventRepository::getFilteredIds() completely unescaped and can be crafted to defeat the plugin's Statement::execute placeholder binder via overlapping strtr() substitution keys.
Technical Analysis
The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no privileges on the target site, and no interaction from a victim user. A successful exploit has high impact on confidentiality.
CWE-89: Improper Neutralization of Special Elements used in an SQL Command
Booking for Appointments and Events Calendar 4.0 – 9.9.1 carries this weakness at getFilteredIds(), and reaching it takes no account at all. SQL injection happens when request data is concatenated into a query instead of being bound as a parameter, letting an attacker change the structure of the statement rather than just its values.
A working injection can read any table the database user can see, which on a WordPress install means user records, password hashes and session or API secrets stored in options. For Booking for Appointments and Events Calendar the fix is 9.9.2: builds 4.0 – 9.9.1 are affected, anything from 9.9.2 onward is not.
Remediation
Update to version 9.9.2, or a newer patched version
How does WordSec protect against this?
Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Booking for Appointments and Events Calendar 9.9.2 closes this, and updating the plugin is the step that ends it.
- Firewall
- Login Security
- Alerts
External References
Related records
Other vulnerabilities in Booking for Appointments and Events Calendar – Amelia Pro
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