CVE-2026-103351 in Taxi Booking Manager Plugin
Summary
by MITRE • 10/05/2026
Improper Validation of Specified Quantity in Input vulnerability in Magepeople inc. Taxi Booking Manager for WooCommerce ecab-taxi-booking-manager allows Input Data Manipulation.This issue affects Taxi Booking Manager for WooCommerce: from n/a through 2.1.1.
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Analysis
by VulDB Data Team • 10/05/2026
The vulnerability identified as Improper Validation of Specified Quantity in Input within the Magepeople Inc. Taxi Booking Manager plugin for WordPress represents a critical security flaw that undermines the integrity of transactional data processing. This issue specifically affects versions from n/a through 2.1.1 and falls under the category of input validation errors where the application fails to adequately verify or sanitize user-supplied numerical values before utilizing them in business logic operations. In the context of an e-commerce booking system, such as a taxi reservation platform built on WooCommerce, accurate quantity handling is paramount for maintaining correct pricing calculations, inventory management, and service allocation. The absence of robust validation mechanisms allows attackers to manipulate input data, potentially leading to unauthorized modifications of order details or financial discrepancies that can compromise both the merchant's revenue integrity and the customer experience.
From a technical perspective, this vulnerability exploits weaknesses in how the plugin processes quantity parameters submitted via HTTP requests during checkout or booking modification phases. When users interact with the interface to select the number of rides, vehicles, or additional services, the backend code likely accepts these values without sufficient checks against expected ranges, data types, or logical constraints. This lack of server-side validation enables an attacker to inject maliciously crafted payloads that alter the quantity field beyond intended limits. For instance, a user might attempt to set negative quantities to reduce order totals artificially, supply excessively large numbers to trigger buffer overflows in underlying systems, or manipulate values to bypass discount thresholds and promotional rules designed by the administrator. The core technical failure lies in the trust placed in client-side controls without corresponding server-side verification, a common pitfall in web application development that violates fundamental security principles regarding data integrity.
The operational impact of this vulnerability extends beyond simple data manipulation errors. It directly facilitates Input Data Manipulation attacks as defined by industry standards such as CWE-20 Improper Input Validation and CWE-74 Injection. By exploiting these flaws, malicious actors can potentially achieve unauthorized access to sensitive booking information, manipulate financial transactions to their advantage, or cause denial of service conditions through resource exhaustion if the system attempts to process absurdly large quantities. Furthermore, in a multi-user environment like WooCommerce, such vulnerabilities can be chained with other weaknesses to escalate privileges or exfiltrate data from associated databases. The trust relationship between the client and server is broken when input validation is insufficient, allowing attackers to bypass business logic controls that are meant to enforce pricing policies, availability checks, and service limits. This not only results in direct financial loss for merchants but also erodes customer confidence in the platform's reliability and security posture.
To mitigate this vulnerability, immediate action must be taken by administrators of affected sites running Magepeople Inc. Taxi Booking Manager versions up to 2.1.1. The primary remediation strategy involves upgrading the plugin to a patched version where proper input validation has been implemented. Developers should ensure that all quantity inputs are validated against strict positive integer constraints and bounded within reasonable limits defined by business rules before being processed by backend logic. Implementing server-side checks is essential, as client-side validations can be easily bypassed using tools like Burp Suite or curl requests. Additionally, integrating Web Application Firewall (WAF) rules to detect anomalous patterns in quantity parameters can provide an additional layer of defense during the transition period. Regular security audits and adherence to secure coding practices outlined by OWASP Top Ten guidelines will help prevent similar issues in future updates, ensuring that input data is treated as untrusted until rigorously validated against expected formats and ranges.