CVE-2026-103334 in Five Star Restaurant Reservations Plugin
Summary
by MITRE • 10/05/2026
Insertion of Sensitive Information Into Sent Data vulnerability in Etoile Web Design Incorporated Five Star Restaurant Reservations restaurant-reservations allows Retrieve Embedded Sensitive Data.This issue affects Five Star Restaurant Reservations: from n/a through 2.7.24.
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Analysis
by VulDB Data Team • 10/05/2026
The identified security flaw within the Five Star Restaurant Reservations software, specifically versions ranging from non-applicable initial releases up to version 2.7.24 developed by Etoile Web Design Incorporated, constitutes a critical information disclosure vulnerability classified under CWE-209 as an Exposure of Sensitive Information Through Data Sent by an Application. This issue arises when the application transmits data containing embedded sensitive information without adequate sanitization or encryption mechanisms in place. The core technical flaw involves the improper handling of user input and internal state variables, which are subsequently included in outbound network requests or API responses that may be intercepted by unauthorized parties. By exploiting this weakness, an attacker can retrieve embedded sensitive data that was not intended for public consumption or external transmission, thereby compromising the confidentiality integrity of the system's operational environment.
From a technical perspective, this vulnerability typically manifests when the application constructs HTTP requests or WebSocket messages using dynamic content derived from user interactions without stripping out internal identifiers, session tokens, database keys, or personally identifiable information that should remain server-side only. The absence of strict output encoding and validation allows these sensitive elements to be embedded directly into the sent data payload. When this payload is transmitted over a network, even if encrypted via TLS, intermediate proxies or compromised endpoints may log the full request body for debugging purposes, inadvertently exposing the sensitive content. Furthermore, if the application relies on client-side logic to manage state, attackers can manipulate these parameters to extract additional internal details that reveal architectural weaknesses or expose backend infrastructure configurations.
The operational impact of this vulnerability is significant, particularly in a restaurant reservation context where customer privacy and business continuity are paramount. Successful exploitation allows malicious actors to access sensitive data such as customer names, contact information, booking histories, payment card details if improperly handled, and internal administrative credentials embedded within the application logic. This exposure can lead to severe consequences including identity theft, financial fraud against customers, and unauthorized access to reservation systems that could disrupt business operations. Additionally, the leaked data may provide attackers with valuable intelligence for crafting more sophisticated social engineering attacks or targeted phishing campaigns against both staff and patrons of the establishment.
To mitigate this vulnerability, developers must implement strict input validation and output encoding practices ensuring that only necessary and non-sensitive fields are transmitted in external requests. It is essential to adopt a principle of least privilege by separating client-side state management from server-side sensitive data handling. Implementing robust encryption for all data in transit using strong cryptographic standards such as TLS 1.2 or higher is mandatory, though this alone does not prevent logging issues at intermediate nodes. Applications should also employ Content Security Policy headers and ensure that error messages do not leak stack traces or internal variable values. Regular security audits and static code analysis tools configured to detect CWE-209 patterns can help identify these flaws early in the development lifecycle. Updating to a patched version of Five Star Restaurant Reservations beyond 2.7.24 is critical, as subsequent releases likely address this data exposure issue through improved sanitization routines and secure coding standards aligned with OWASP guidelines for preventing sensitive information leakage.