CVE-2026-24561 identifies a Missing Authorization vulnerability in the FluentBoards product developed by Mahmudul Hasan Arif, affecting all versions up to and including 1.91.1. This vulnerability stems from incorrectly configured access control security levels within the application, which means that certain operations or data access points do not properly verify whether a user has the necessary permissions before allowing the action. As a result, an attacker could exploit this flaw to bypass authorization checks, potentially accessing or modifying data, or performing actions reserved for privileged users. The vulnerability does not require prior authentication or user interaction, increasing its risk profile. Although no public exploits have been reported yet, the nature of missing authorization issues typically makes them attractive targets for attackers seeking to escalate privileges or exfiltrate sensitive information. The absence of a CVSS score indicates that the vulnerability is newly published and has not yet been fully assessed or scored by standard frameworks. The vulnerability affects all deployments of FluentBoards up to version 1.91.1, which is a collaborative project management or task tracking tool, likely used in various organizational contexts. The root cause is a misconfiguration or design flaw in access control enforcement, which is a critical security principle. Without proper authorization checks, the integrity and confidentiality of data managed by FluentBoards are at risk. The vulnerability was published on January 23, 2026, and assigned by Patchstack, with no patches or exploit information currently available.

For European organizations, this vulnerability poses a significant risk to the confidentiality and integrity of project management and collaboration data handled by FluentBoards. Unauthorized access could lead to data leakage, unauthorized modifications, or disruption of workflows. Organizations in sectors such as finance, healthcare, government, and critical infrastructure that rely on FluentBoards for internal coordination could face operational disruptions or compliance violations under GDPR if sensitive personal data is exposed. The lack of authentication requirement for exploitation increases the attack surface, potentially allowing external attackers to compromise systems remotely. The impact extends beyond data loss to include reputational damage and potential regulatory penalties. Since FluentBoards may be integrated with other enterprise systems, the vulnerability could serve as a pivot point for broader network compromise. The absence of known exploits currently provides a window for proactive mitigation, but the risk remains high due to the fundamental nature of the authorization flaw.

European organizations should immediately audit their FluentBoards deployments to identify and rectify any misconfigured access control settings. Until an official patch is released, administrators should restrict access to FluentBoards instances using network-level controls such as VPNs or IP whitelisting to limit exposure. Implement strict role-based access controls (RBAC) and verify that all sensitive operations require appropriate authorization checks. Monitor FluentBoards logs for unusual access patterns or unauthorized actions. Engage with the vendor or community to obtain patches or updates addressing this vulnerability as soon as they become available. Consider isolating FluentBoards environments from critical systems to reduce lateral movement risk. Additionally, conduct security awareness training for users to recognize potential exploitation attempts. Finally, maintain up-to-date backups of FluentBoards data to enable recovery in case of compromise.