CVE-2026-64948 in Pandora FMS
Summary
by MITRE • 10/01/2026
Missing authorization in module data retrieval allows unauthorized cross-group access to module history. Affects Pandora FMS from 777 onwards.
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Analysis
by VulDB Data Team • 10/01/2026
The identified vulnerability represents a critical failure in the implementation of Access Control Lists within the Pandora FMS software suite, specifically affecting versions starting from build 777. This flaw is categorized under CWE-284, which describes Improper Access Control, and more precisely aligns with CWE-862 regarding Missing Authorization checks. The core technical issue lies in the data retrieval module's inability to properly validate user permissions against group boundaries before serving historical operational data. In a typical multi-tenant or departmentalized deployment of Pandora FMS, distinct groups are established to isolate monitoring responsibilities and restrict visibility into specific infrastructure components. However, due to this authorization gap, an authenticated attacker can manipulate input parameters associated with module history requests to bypass these logical security controls.
From a technical perspective, the vulnerability exploits the server-side logic that processes queries for historical performance data or event logs. When a user initiates a request to view the history of a specific monitoring module, the application fails to cross-reference the requesting user's group membership with the ownership or access permissions assigned to that particular module and its associated host groups. Consequently, the system returns sensitive operational metrics, configuration details, or historical performance trends belonging to other organizational units without requiring elevated privileges for those resources. This behavior indicates a lack of server-side validation where client-supplied identifiers are trusted implicitly rather than being verified against an authoritative access control matrix stored in the backend database.
The operational impact of this vulnerability is significant, particularly in environments where Pandora FMS serves as a centralized monitoring platform for multiple departments or external clients. An unauthorized user can achieve cross-group data exfiltration by systematically iterating through module identifiers to harvest historical data from restricted groups. This access allows adversaries to gather intelligence on network topology, server performance baselines, and potential security incidents detected within other segments of the infrastructure. Such information disclosure facilitates further reconnaissance efforts, enabling attackers to identify high-value targets or weaknesses in adjacent systems that were previously obscured by group isolation policies. The exposure of historical data may also reveal patterns in system usage that could aid in crafting more effective social engineering attacks or timing-based exploits against critical services monitored within those restricted groups.
This vulnerability maps directly to the ATT&CK technique T1005, which refers to Data from Local System Retrieval, as it involves extracting sensitive information stored locally on the monitoring server's database. Furthermore, because the exploitation relies on manipulating API endpoints or web interface parameters without needing additional authentication steps beyond initial login, it also relates to T1078, Valid Accounts, where legitimate credentials are abused for unauthorized access. The absence of proper authorization checks means that any authenticated user with low-level privileges can escalate their effective permissions regarding data visibility, undermining the principle of least privilege fundamental to secure system architecture.
Mitigation strategies must prioritize immediate patching and configuration hardening. Administrators should apply the latest security updates provided by Pandora FMS vendors, which typically include corrected access control logic in subsequent releases beyond version 777. In cases where upgrading is not immediately feasible, network-level controls such as Web Application Firewalls can be configured to inspect requests for suspicious patterns indicative of enumeration attacks against module history endpoints. Additionally, implementing strict logging and monitoring on the application server will help detect anomalous access patterns that suggest exploitation attempts. It is also advisable to review existing group configurations and ensure that no sensitive modules are inadvertently assigned broad visibility permissions while awaiting permanent code fixes. Regular audits of user roles and permission sets should be conducted to verify that data isolation boundaries remain intact across all active groups within the monitoring infrastructure.