CVE-2026-48955 in Joomla! CMS
Summary
by MITRE • 07/07/2026
An improper access check allows unauthorized users to access workflow stage and transition information.
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Analysis
by VulDB Data Team • 07/07/2026
This vulnerability represents a critical authorization flaw that undermines the security of workflow management systems by allowing unauthorized individuals to bypass proper access controls. The issue manifests when the system fails to properly validate user permissions before granting access to workflow stage details and transition data, creating an information disclosure risk that can expose sensitive business process information. Such flaws typically occur in enterprise resource planning systems, business process management platforms, or workflow engines where role-based access control mechanisms are inadequately implemented or bypassed.
The technical implementation of this vulnerability stems from insufficient input validation and access control checks within the workflow engine's authorization logic. When users attempt to access workflow stage information or transition details, the system should verify that the requesting entity possesses appropriate privileges based on their role, permissions, or assigned workflow responsibilities. However, in vulnerable implementations, these checks either fail to execute properly or contain logical flaws that allow unauthorized access regardless of user credentials or role assignments. This can occur through various means including improper session validation, weak authentication mechanisms, or flawed permission checking routines that do not adequately enforce the principle of least privilege.
The operational impact of this vulnerability extends beyond simple information disclosure, potentially enabling attackers to map out entire business processes, identify critical workflow transitions, and understand system dependencies that could be exploited for further attacks. An attacker with access to workflow stage information might discover sensitive process boundaries, identify high-value workflow endpoints, or gain insights into business logic that could facilitate more sophisticated attacks such as privilege escalation or process manipulation. This information can be particularly valuable in targeted attacks against enterprise systems where understanding workflow processes provides attackers with a roadmap for system exploitation and internal reconnaissance.
Organizations should implement comprehensive access control measures including robust session management, proper role-based access controls, and thorough input validation to address this vulnerability. The fix typically involves strengthening the authorization logic to ensure that every request for workflow stage or transition information undergoes proper authentication and authorization checks before any data is returned. Security patches should include mandatory permission verification at all entry points for workflow-related operations, implementation of proper logging mechanisms to track unauthorized access attempts, and enforcement of principle of least privilege across all workflow system components. Additionally, regular security testing including penetration testing and code reviews focused on access control logic can help identify similar vulnerabilities before they can be exploited by malicious actors.
This type of vulnerability aligns with CWE-284 which describes improper access control conditions, and maps to ATT&CK technique T1078 for valid accounts and T1566 for credential harvesting. The weakness specifically relates to insufficient authorization checks within workflow management systems and can contribute to broader attack chains where initial reconnaissance leads to more significant compromise opportunities. Organizations should treat this as a high-priority remediation item and implement layered security controls including network segmentation, access control lists, and continuous monitoring of workflow system access patterns to detect anomalous behavior that might indicate exploitation attempts.