CVE-2026-22396 in Fiorello Plugin
Summary
by MITRE • 01/22/2026
Authorization Bypass Through User-Controlled Key vulnerability in Mikado-Themes Fiorello fiorello allows Exploiting Incorrectly Configured Access Control Security Levels.This issue affects Fiorello: from n/a through <= 1.0.
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Analysis
by VulDB Data Team • 01/28/2026
This vulnerability represents a critical authorization bypass flaw classified as CWE-285 which enables attackers to circumvent access controls by manipulating user-controlled keys within the Mikado-Themes Fiorello fiorello theme. The vulnerability stems from incorrectly configured access control security levels that allow unauthorized users to gain elevated privileges or access restricted functionality through manipulation of key parameters. The affected version range indicates that all versions up to and including 1.0 are susceptible to this exploitation, suggesting a fundamental flaw in the theme's security architecture that was not properly addressed in the release.
The technical implementation of this vulnerability allows an attacker to exploit user-controlled keys that are improperly validated or sanitized within the authorization framework. When the system processes these keys without adequate verification mechanisms, it creates opportunities for privilege escalation or unauthorized access to protected resources. The flaw likely manifests in how the theme handles authentication tokens, session identifiers, or access control parameters that should normally be restricted to authorized users. This misconfiguration enables attackers to craft malicious inputs that bypass the intended security controls and gain access to functionality that should be restricted.
Operationally, this vulnerability poses significant risks to systems running the affected theme, as it can lead to complete compromise of user data, unauthorized administrative access, and potential lateral movement within network environments. Attackers could exploit this weakness to access sensitive information, modify content, or perform actions that should be restricted to authenticated administrators. The impact extends beyond simple data exposure, as the bypass allows for persistent access that could remain undetected for extended periods. This vulnerability aligns with ATT&CK technique T1078 which covers valid accounts and privilege escalation through improper access control configurations.
Mitigation strategies should focus on implementing proper input validation and sanitization of all user-controlled keys within the authorization framework. Security patches should enforce strict access control policies that validate all parameters against predefined security rules rather than relying on user-supplied values. Organizations should implement comprehensive access control reviews and ensure that all authentication mechanisms properly validate session tokens and access permissions. Regular security assessments and penetration testing should be conducted to identify similar misconfigurations in other components of the system. Additionally, implementing principle of least privilege access controls and monitoring for anomalous access patterns can help detect exploitation attempts. The vulnerability demonstrates the critical importance of proper access control implementation and the potential for seemingly minor configuration errors to result in major security breaches.