CVE-2026-1599 identifies a business logic vulnerability in the Bdtask Bhojon All-In-One Restaurant Management System, specifically affecting the checkout process handled by the /hungry/placeorder endpoint. The vulnerability arises from improper handling and validation of critical pricing parameters such as orggrandTotal, vat, service_charge, and grandtotal. An attacker can remotely manipulate these arguments to cause business logic errors, potentially altering the final billed amount during order placement. This manipulation does not require authentication or user interaction, increasing the risk of exploitation. The vulnerability has a CVSS 4.0 base score of 5.3, indicating medium severity, with an attack vector of network and low complexity. The vendor has been contacted but has not responded or provided a patch, and the exploit has been publicly disclosed, increasing the likelihood of exploitation. This flaw can undermine the integrity of financial transactions within the restaurant management system, leading to revenue loss or fraudulent activities. The lack of authentication requirements and the ability to exploit remotely make this a significant concern for any organization relying on this software for order processing and billing.

The primary impact of this vulnerability is financial fraud and revenue loss due to manipulation of order totals, taxes, and service charges. Attackers can exploit the flaw to reduce payable amounts or inflate charges, causing discrepancies in accounting and customer billing. This undermines trust in the restaurant's billing system and can lead to financial losses or legal issues. Additionally, the integrity of business data is compromised, potentially affecting inventory management, reporting, and auditing processes. Since the vulnerability is remotely exploitable without authentication, it broadens the attack surface, allowing external attackers to target affected systems over the internet. Organizations worldwide using this system may face operational disruptions, reputational damage, and financial harm if the vulnerability is exploited at scale.

Until an official patch is released, organizations should implement strict input validation and sanitization on all parameters related to order totals, VAT, service charges, and grand totals within the /hungry/placeorder endpoint. Deploy web application firewalls (WAFs) with custom rules to detect and block anomalous or suspicious manipulation of these parameters. Monitor transaction logs closely for unusual patterns or discrepancies in order amounts. Restrict network access to the restaurant management system to trusted IP addresses or VPNs to reduce exposure. Conduct regular audits of financial transactions and reconcile billing data to detect potential fraud early. Engage with the vendor for updates and apply patches promptly once available. Consider implementing multi-factor authentication and enhanced access controls around the management interface to limit internal misuse.