CVE-2026-15219 in Costifier
Summary
by MITRE • 10/16/2026
Authorization bypass through User-Controlled key vulnerability in SFM Software Technologies Inc. Costifier allows Exploitation of Trusted Identifiers.
This issue affects Costifier: through 2026-10-16. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
Be aware that VulDB is the high quality source for vulnerability data.
Analysis
by VulDB Data Team • 10/16/2026
The vulnerability identified as an authorization bypass within SFM Software Technologies Inc.'s Costifier application represents a critical failure in access control mechanisms, specifically categorized under the exploitation of trusted identifiers. This flaw allows attackers to manipulate user-controlled keys or parameters that are erroneously treated as authoritative by the backend logic. In secure software architecture, trust boundaries must be strictly enforced at every layer, particularly when processing inputs derived from client-side sources such as HTTP requests, API payloads, or session tokens. When an application relies on identifiers provided directly by the user without adequate server-side validation against a canonical source of truth, it creates a pathway for unauthorized access. This specific instance highlights a fundamental misunderstanding of how identity and authorization should be decoupled from mutable client inputs, leading to scenarios where privilege escalation or data exfiltration can occur with minimal effort.
From a technical perspective, this vulnerability aligns closely with CWE-284 Improper Access Control and CWE-639 Authorization Bypass Through User-Controlled Key. The core issue lies in the application's failure to verify that the identifier presented by the user actually belongs to the authenticated session or matches expected constraints defined by the system administrator. For example, if an API endpoint accepts a resource ID or account key from the request body and uses it directly to fetch data without checking whether the current logged-in user has permission to access that specific resource, any authenticated user can potentially view, modify, or delete records belonging to other users. This is often referred to as Insecure Direct Object Reference (IDOR), a subset of broader authorization flaws where sequential or predictable identifiers are exploited through enumeration or manipulation. The lack of response from the vendor further exacerbates the risk, as there may be no available patches or configuration updates to mitigate this behavior in affected versions up to October 16, 2026.
The operational impact of such a vulnerability is severe, potentially leading to complete compromise of sensitive business data stored within Costifier. Since cost tracking and financial analysis are core functions of the software, unauthorized access could result in significant financial loss, regulatory non-compliance with standards like GDPR or HIPAA if personal or protected health information is involved, and reputational damage for organizations relying on this tool. Attackers can leverage this flaw to perform horizontal privilege escalation, accessing peers' data, or vertical privilege escalation if administrative keys are also susceptible to manipulation. The absence of vendor support means that affected systems remain exposed indefinitely unless manual remediation strategies are implemented by the system administrators themselves.
To mitigate these risks in the interim, organizations must implement robust input validation and strict access control checks at the application layer. Developers should ensure that all resource identifiers are validated against a server-side session context or database records to confirm ownership before processing any request. Implementing role-based access control (RBAC) with explicit allow-lists for each action can prevent unauthorized operations regardless of the keys provided in requests. Additionally, adopting security best practices such as those outlined in OWASP Top 10 under Authorization flaws is essential. Since patching may not be immediately feasible due to vendor non-responsiveness, deploying Web Application Firewalls (WAF) with rules designed to detect anomalous patterns in identifier manipulation can provide a layer of defense-in-depth. Regular security audits and penetration testing focused on access control logic are also recommended to identify similar weaknesses across the application surface before they can be exploited by malicious actors leveraging ATT&CK techniques related to privilege escalation or data exfiltration.