CVE-2026-52782

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

26/06/2026

Last modified:

29/06/2026

Description

OpenProject is open-source, web-based project management software. Prior to 17.3.3 and 17.4.1, there is an IDOR through /projects//settings/project_storages/ via PATCH parameter "storages_project_storage[project_folder_id]" leads to Access to Unauthorized Resources. A project-admin in one project can hijack the managed Nextcloud or OneDrive folder of another project on the same storage by writing the victim project&#39;s project_folder_id into the attacker&#39;s Storages::ProjectStorage row. The next managed-folder sync overwrites the ACL on the referenced folder with the attacker project&#39;s user list. This vulnerability is fixed in 17.3.3 and 17.4.1.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 9.90 CRITICAL
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

9.90

Severity 3.x

CRITICAL

References to Advisories, Solutions, and Tools

https://github.com/opf/openproject/security/advisories/GHSA-3vpx-94qx-xpw6