CVE-2015-2821 in Neos
Summary
by MITRE
TYPO3 Neos 1.1.x before 1.1.3 and 1.2.x before 1.2.3 allows remote editors to access, create, and modify content nodes in the workspace of other editors via unspecified vectors.
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Analysis
by VulDB Data Team • 04/16/2018
The vulnerability identified as CVE-2015-2821 affects TYPO3 Neos content management systems version 1.1.x prior to 1.1.3 and 1.2.x prior to 1.2.3, representing a critical access control flaw that undermines the fundamental security model of collaborative content editing environments. This issue specifically targets the workspace isolation mechanisms that TYPO3 Neos implements to ensure that different editors can work independently within their designated content areas without unauthorized access to each other's work. The vulnerability arises from insufficient validation of user permissions and workspace boundaries, allowing remote editors to bypass normal access controls and manipulate content nodes in other users' workspaces.
The technical nature of this flaw stems from inadequate input validation and authorization checks within the content management system's workspace handling components. Attackers can exploit this weakness through unspecified vectors that likely involve manipulating API calls or direct requests to the content node management interfaces. The vulnerability operates at the application layer and requires remote access, making it particularly dangerous as it can be exploited from external networks without requiring physical access to the system. This represents a classic case of insufficient authorization checks, which maps directly to CWE-285, specifically the weakness related to insufficient authorization mechanisms in web applications. The flaw essentially allows privilege escalation through unauthorized workspace access, enabling attackers to perform actions that should be restricted to specific user roles or workspace owners.
The operational impact of CVE-2015-2821 extends far beyond simple data exposure, as it fundamentally compromises the integrity and confidentiality of collaborative content management workflows. Remote editors can not only view sensitive content created by other users but can also modify, delete, or create new content nodes within workspaces they should not have access to. This capability can lead to data corruption, unauthorized content publication, information disclosure, and potential reputational damage for organizations relying on TYPO3 Neos for their digital content management. The vulnerability undermines the trust model of collaborative editing environments where users expect their workspace content to remain isolated and secure from unauthorized access by other team members. From an attack perspective, this flaw aligns with ATT&CK technique T1078 which covers valid accounts usage, as attackers can leverage legitimate editor accounts to access unauthorized workspace content, making detection more challenging.
Organizations affected by this vulnerability should immediately implement the available patches and updates provided by TYPO3 Neos developers, specifically upgrading to version 1.1.3 or 1.2.3 respectively. System administrators should conduct thorough audits of user permissions and workspace configurations to identify any unauthorized access that may have occurred during the vulnerability window. Network segmentation and monitoring controls should be enhanced to detect unusual API access patterns that might indicate exploitation attempts. Additional mitigations include implementing stricter access controls at the network level, regular security scanning of the content management infrastructure, and comprehensive user access reviews. The vulnerability demonstrates the critical importance of proper authorization mechanisms in collaborative software environments and highlights the necessity of regular security updates and vulnerability assessments in content management systems that support multi-user editing workflows.