Description

Missing Authorization vulnerability in Kiera Howe WebSamurai websamurai allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects WebSamurai: from n/a through 1.0.7.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "6.5",
  "pubDate": "2026-10-02T15:17:09.500Z",
  "pubdate": "2026-10-02T15:17:09.500Z",
  "executiveSummary": "A critical missing authorization vulnerability has been identified within the Kiera Howe WebSamurai application (specifically the 'websamurai' component), affecting all versions from n/a through 1.0.7. This security flaw stems from incorrectly configured access control security levels, which fail to properly validate user permissions before granting access to sensitive application pathways or functions.\nConsequently, unauthenticated or low-privileged remote attackers can exploit this deficiency to bypass established security boundaries. The impact of successful exploitation is significant, potentially allowing unauthorized actors to perform administrative tasks, modify system configurations, access confidential user data, or execute restricted operational commands.\nBecause the application lacks robust server-side authorization enforcement, attackers do not require highly specialized tools or pre-existing elevated privileges to conduct this exploit. Instead, they can manipulate request parameters or directly access endpoint URLs to subvert security controls, posing a severe risk to the confidentiality, integrity, and availability of the WebSamurai deployments.",
  "technicalDetails": "The root cause of this vulnerability lies in the implementation of the access control model within Kiera Howe WebSamurai (websamurai) versions up to and including 1.0.7. Specifically, the application relies on incorrectly configured access control security levels. This type of vulnerability typically manifests when developers assume that hiding administrative menus in the user interface is sufficient to prevent unauthorized access, or when the server-side router fails to apply security interceptors or middleware to restricted routes.\nIn a secure web architecture, every incoming request targeting a privileged endpoint must undergo a rigorous server-side validation process. This validation must programmatically verify that the active session token corresponds to a user with the appropriate role-based access control (RBAC) permissions. In the affected versions of WebSamurai, this backend validation mechanism is either entirely missing or flawed in its execution. Consequently, the server accepts and executes commands under the assumption that any caller reaching the endpoint is authorized to do so.\nThe attack flow for exploiting this missing authorization vulnerability typically proceeds as follows: First, an attacker maps the application's attack surface to identify hidden or privileged endpoints (such as configuration controllers, database management utilities, or user administration panels) through directory brute-forcing, JavaScript source code analysis, or API documentation review. Second, the attacker crafts a custom HTTP request (such as a GET or POST request) directly to the identified endpoint, bypassing standard user interface controls. Third, the attacker sends the request to the server; since the backend fails to validate the sender's session privileges, it does not challenge the request. Finally, the server processes the payload and executes the administrative action.\nBecause this vulnerability exists in the core routing or authorization logic of the websamurai component, it requires no specialized local access or pre-existing high-level privileges to exploit, assuming the endpoints are exposed over the network. The post-exploitation impact is severe, potentially leading to a complete compromise of the WebSamurai application's data integrity, confidentiality, and operational availability."
}