CVE-2026-73692 in Dolibarr
Summary
by MITRE • 08/18/2026
Dolibarr contains an authorization bypass vulnerability in the clonetasks mass action that allows authenticated users with project creation permissions to clone tasks into private projects they are not authorized to access. An inverted boolean condition in the private-project membership check within actions_massactions.inc.php causes the authorization flag to be set for unauthorized users, allowing attackers to supply a user-controlled projectid POST parameter to create task records in any private project.
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Analysis
by VulDB Data Team • 08/18/2026
The vulnerability identified in Dolibarr represents a critical authentication and access control failure specifically located within the mass action functionality responsible for cloning tasks. This flaw is rooted in an inverted boolean condition during the verification of private-project membership, which fundamentally undermines the intended security model of the application. In secure software design, authorization checks must strictly enforce that only users with explicit permissions can perform actions on specific resources. However, due to this logical error, the system incorrectly grants access privileges when a user lacks them, effectively bypassing the protective barriers designed to isolate private project data from unauthorized personnel.
From a technical perspective, the defect resides in the file actions_massactions.inc.php, where the logic governing task cloning operations fails to correctly validate the relationship between the authenticated user and the target private project. The application relies on an inverted boolean check that sets the authorization flag to true even when the user is not a member of the specified private project. This allows attackers who possess valid credentials with basic project creation permissions to exploit this logic by supplying a controlled projectid parameter via POST requests. By manipulating this input, malicious actors can force the system to create task records within any private project on the platform, regardless of whether they have been granted access rights to that specific workspace.
The operational impact of this vulnerability is significant, as it leads directly to unauthorized data exposure and potential integrity violations. Since Dolibarr often manages sensitive business information including financial details, client communications, and strategic plans stored within these private projects, the ability for an authenticated user to write into any such project compromises confidentiality across the organization. Furthermore, because the attacker can create task records, they may also introduce malicious content or disrupt workflow processes by adding fraudulent tasks that other team members might act upon. This scenario illustrates a classic case of broken access control where role-based permissions are circumvented through logical flaws rather than technical exploitation of input validation weaknesses alone.
In terms of industry standard classifications, this vulnerability aligns with CWE-284 Improper Access Control and specifically relates to CWE-601 URL Redirection to Untrusted Site (if applicable in broader context) but more accurately fits CWE-862 Missing Authorization or CWE-937 Use of OWASP Broken Access Control Categories. It also maps to the MITRE ATT&CK framework under Tactic TA0001 Initial Access and Technique T1078 Valid Accounts, as it leverages legitimate credentials to perform unauthorized actions within a trusted environment. The specific behavior resembles aspects of CWE-269 Improper Privilege Management where the system fails to enforce least privilege principles during resource manipulation operations.
To mitigate this risk, immediate remediation should focus on correcting the boolean logic in the affected source file to ensure that authorization is strictly verified before any task cloning operation proceeds. Developers must implement a robust check that confirms the authenticated user has explicit membership or administrative rights for the target private project ID provided in the request. Additionally, implementing server-side validation of all input parameters related to resource identifiers can prevent manipulation attempts. Security teams should also consider enforcing stricter role-based access controls and auditing logs for unusual patterns of task creation across multiple private projects by single users to detect potential exploitation activities early. Regular code reviews focusing on authentication and authorization logic are essential to preventing similar logical flaws in future updates.