CVE-2026-13161
Received Received - Intake

SQL Injection in TrueBooker WordPress Plugin

Publication date: 2026-07-28

Last updated on: 2026-07-28

Assigner: Wordfence

Description
The TrueBooker – Appointment Booking and Scheduler System plugin for WordPress is vulnerable to generic SQL Injection via the 'alldata[truebooker_user]' parameter in all versions up to, and including, 1.2.2 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. The check_ajax_referer() nonce guard does not constitute an authentication or authorization barrier because the nonce is exposed to unauthenticated visitors on TrueBooker front-end booking pages; exploitation additionally requires that the required booking fields (category, service, person, date, and time slot) be present in the alldata POST parameter so that execution reaches the vulnerable SQL query branch.

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Meta Information

Published
2026-07-28
Last Modified
2026-07-28
Generated
2026-07-28
AI Q&A
2026-07-28
EPSS Evaluated
N/A
NVD
CVE-2026-13161
EUVD
EUVD-2026-49722

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
truebooker truebooker to 1.2.2 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
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. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.

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Executive Summary

The TrueBooker WordPress plugin up to version 1.2.2 has a SQL injection flaw in the 'alldata[truebooker_user]' parameter. Due to poor input sanitization and lack of proper SQL query preparation, unauthenticated attackers can inject malicious SQL queries to extract sensitive database information. The plugin's nonce check does not prevent exploitation because the nonce is exposed to unauthenticated users on front-end pages.

Detection Guidance

This vulnerability can be detected by checking for suspicious SQL query patterns in web server logs or by monitoring database activity for unauthorized queries. Look for POST requests to TrueBooker endpoints with alldata[truebooker_user] parameters containing SQL syntax like UNION, SELECT, or other SQL commands.

Impact Analysis

Unauthenticated attackers could steal sensitive data from your WordPress database, such as user credentials, personal information, or other confidential records. If your site handles bookings with required fields (category, service, person, date, time slot), the risk of exploitation increases as these fields trigger the vulnerable code path.

Compliance Impact

This vulnerability could lead to unauthorized access and exfiltration of personal data, violating GDPR and HIPAA requirements for data protection and confidentiality. Organizations may face legal penalties, reputational damage, and loss of compliance certifications if exploited.

Mitigation Strategies

Immediately update the TrueBooker plugin to the latest version if available. If not, disable the plugin until a patch is released. Implement a web application firewall to block SQL injection attempts and review database access logs for signs of exploitation.

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