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Dolibarr ERP CVE-2026-77923

| EUVDEUVD-2026-65087 MEDIUM
Incorrect Authorization (CWE-863)
2026-08-24 VulnCheck GHSA-3qg7-9j56-rpfq
PHP Authentication Bypass Dolibarr
5.3
CVSS 4.0 · Vendor: VulnCheck
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Severity by source

Vendor (VulnCheck) PRIMARY
5.3 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
4.3 MEDIUM

Network-accessible with low complexity; requires authenticated user holding project-creation rights (PR:L); impact is integrity-only via unauthorized task cloning, no confidentiality or availability effect.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (VulnCheck).

CVSS VectorVendor: VulnCheck

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

2
Source Code Evidence Fetched
Aug 24, 2026 - 20:04 vuln.today
Analysis Generated
Aug 24, 2026 - 20:04 vuln.today

DescriptionCVE.org

Dolibarr 21.0.0 before 24.0.0 contains an authorization bypass vulnerability caused by an inverted boolean condition in the private-project membership check within the clonetasks mass action handler in htdocs/core/actions_massactions.inc.php. Authenticated users with project creation permission but without access to a target private project can exploit the flawed !in_array() check to clone tasks into unauthorized private projects.

AnalysisAI

Authorization bypass in Dolibarr ERP versions 21.0.0 through 23.x allows authenticated users holding project-creation permission to clone tasks into private projects they are not authorized to access. The flaw is an inverted boolean logic error in the clonetasks mass action handler - !in_array() is used where in_array() is required, causing the private-project membership check to pass precisely for unauthorized users and fail for authorized ones. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Authenticate with project-creation permission
Delivery
Enumerate or guess private project ID
Exploit
Submit crafted clonetasks mass action request
Execution
Inverted !in_array() check grants unauthorized access
Impact
Clone tasks into private project
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Vulnerability AssessmentAI

Exploitation The attacker must be authenticated to Dolibarr with the 'project creation' permission assigned to their user role (reflected by PR:L in the CVSS vector). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:L/UI:N with VI:L only) yields a score of 5.3, accurately reflecting bounded impact: exploitation requires authentication (PR:L), and the consequence is restricted to unauthorized task cloning with no confidentiality or availability breach. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An authenticated Dolibarr employee with standard project-creation rights enumerates or guesses the numeric ID of a private project containing sensitive business data they should not access. They craft and submit a clonetasks mass action HTTP request targeting that private project ID; the inverted `!in_array()` check incorrectly validates their membership and completes the clone operation, injecting tasks into the confidential project and potentially polluting its task history or exposing project existence. …
Remediation Upgrade Dolibarr to version 24.0.0, which contains the corrected boolean logic per commit 1730aa56675b31cfede895fdae55b673d887fb8f (https://github.com/Dolibarr/dolibarr/commit/1730aa56675b31cfede895fdae55b673d887fb8f); the release is available at https://github.com/Dolibarr/dolibarr/releases/tag/24.0.0. … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-77923 vulnerability details – vuln.today
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