Summaryinfo

A vulnerability classified as critical has been found in ameliabooking Booking for Appointments and Events Calendar Plugin up to 2.1.2 on WordPress. This affects an unknown part of the file PaymentRepository.php of the component Payments Listing Endpoint. The manipulation of the argument sort leads to sql injection. This vulnerability is documented as CVE-2026-4668. The attack can be initiated remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in ameliabooking Booking for Appointments and Events Calendar Plugin up to 2.1.2 on WordPress. This issue affects some unknown processing of the file PaymentRepository.php of the component Payments Listing Endpoint. The manipulation of the argument sort with an unknown input leads to a sql injection vulnerability. Using CWE to declare the problem leads to CWE-89. The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

The Booking for Appointments and Events Calendar - Amelia plugin for WordPress is vulnerable to SQL Injection via the `sort` parameter in the payments listing endpoint in all versions up to, and including, 2.1.2. This is due to insufficient escaping on the user-supplied `sort` parameter and lack of sufficient preparation on the existing SQL query in `PaymentRepository.php`, where the sort field is interpolated directly into an ORDER BY clause without sanitization or whitelist validation. PDO prepared statements do not protect ORDER BY column names. GET requests also skip Amelia's nonce validation entirely. This makes it possible for authenticated attackers, with Manager-level (`wpamelia-manager`) access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database via time-based blind SQL injection.

The weakness was released by Michael Perla. The advisory is shared at wordfence.com. The identification of this vulnerability is CVE-2026-4668 since 03/23/2026. The exploitation is known to be easy. The attack may be initiated remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1505 for this issue.

By approaching the search of inurl:PaymentRepository.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 2.1 eliminates this vulnerability.

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Productinfo

Type

• Calendar Software

Vendor

• ameliabooking

Name

• Booking for Appointments and Events Calendar Plugin

Version

• 2.1.0
• 2.1.1
• 2.1.2

CPE 2.3info

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CPE 2.2info

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