CVE-2026-41878 in DMS
Summary
by MITRE • 07/10/2026
R-SOFT DMS is vulnerable to Insecure Direct Object Reference (IDOR) attack in multiple file download endpoints. The application fetches files from the database by ID and serves them to whoever requests them, relying only on session authentication, meaning any valid user can access any file.
This issue was fixed in version v3.19-2862 and v3.17-2580.
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Analysis
by VulDB Data Team • 07/10/2026
The R-SOFT DMS application suffers from a critical Insecure Direct Object Reference vulnerability that compromises the integrity of its file access controls. This weakness allows authenticated users to bypass normal access restrictions by directly manipulating object references in the application's file download endpoints. The vulnerability stems from the application's design pattern where it retrieves files from the database based on ID parameters without implementing proper authorization checks to verify whether the requesting user should have access to the specific resource. The system only relies on session authentication for validation, meaning that any authenticated user can potentially access files they should not be authorized to retrieve simply by knowing or guessing valid identifiers.
This vulnerability represents a classic implementation flaw categorized under CWE-284 Access Control Issues, specifically manifesting as an insecure direct object reference that enables unauthorized data access. The attack vector is particularly dangerous because it operates at the application layer where user sessions are already established, making exploitation straightforward for attackers who can enumerate or guess valid file identifiers. The impact extends beyond simple information disclosure to potentially expose sensitive documents, proprietary data, or confidential information that should remain restricted to specific user roles or departments within the organization.
The operational implications of this vulnerability are severe and multifaceted across multiple attack vectors defined in the MITRE ATT&CK framework under T1213 Data from Information Repositories and T1566 Credential Access. An attacker with valid session credentials can systematically access files by modifying URL parameters or API calls, potentially leading to unauthorized data exfiltration, intellectual property theft, or compliance violations. The vulnerability affects the application's core security model where object references are directly exposed to users, creating a pathway for privilege escalation and lateral movement within the system. Organizations relying on R-SOFT DMS for document management face significant risks including regulatory non-compliance, financial loss, and reputational damage when such vulnerabilities exist in production environments.
The remediation for this vulnerability requires implementing proper access control checks at each file download endpoint where objects are retrieved by ID. This includes validating that the requesting user has appropriate authorization to access the specific resource before serving the content. The fix should involve establishing clear access control policies that verify ownership, role-based permissions, or other authorization mechanisms before allowing file retrieval operations. Organizations must ensure that all file access points implement proper object-level access controls and that users cannot bypass these controls through direct reference manipulation. The vulnerability was addressed in versions v3.19-2862 and v3.17-2580, which likely introduced mandatory authorization checks for all download operations and strengthened the session validation process to prevent unauthorized resource access.
Security teams should conduct comprehensive penetration testing to identify all endpoints that may be susceptible to similar direct object reference vulnerabilities, particularly in applications with complex document management systems. The implementation of proper access control mechanisms aligns with industry best practices outlined in NIST SP 800-53 and ISO/IEC 27001 standards for information security management. Regular security assessments should verify that all user interactions with database objects include appropriate authorization checks, preventing attackers from exploiting indirect references to gain unauthorized access to sensitive resources. Additionally, organizations must implement proper logging and monitoring of file access patterns to detect unusual activity that may indicate exploitation attempts against IDOR vulnerabilities in their systems.