{"id":"CVE-2026-52782","aliases":["EUVD-2026-39870","GHSA-3vpx-94qx-xpw6"],"status":"published","title":"OpenProject: IDOR through /projects/\u003cA\u003e/settings/project_storages/\u003cA_ps_id\u003e via PATCH parameter \"storages_project_storage[project_folder_id]\" leads to Access to Unauthorized Resources","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/\u003cA\u003e/settings/project_storages/\u003cA_ps_id\u003e 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's project_folder_id into the attacker's Storages::ProjectStorage row. The next managed-folder sync overwrites the ACL on the referenced folder with the attacker project's user list. This vulnerability is fixed in 17.3.3 and 17.4.1.","severity":{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00454,"percentile":0.39868,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":false},"cwes":["CWE-639"],"published":"2026-06-26T18:59:27Z","modified":"2026-10-28T02:31:11Z","exploits":[{"source":"pocgithub","id":"abraxas/CVE-2026-52782","title":"abraxas/CVE-2026-52782","date":"2026-09-26","url":"https://github.com/abraxas/CVE-2026-52782"}],"products":[{"vendor":"opf","product":"openproject"}],"references":[{"url":"https://github.com/opf/openproject/security/advisories/GHSA-3vpx-94qx-xpw6","tags":["x_refsource_CONFIRM","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52782.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52782","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-52782","title":"OpenProject: IDOR through /projects/\u003cA\u003e/settings/project_storages/\u003cA_ps_id\u003e via PATCH parameter \"storages_project_storage[project_folder_id]\" leads to Access to Unauthorized Resources","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/\u003cA\u003e/settings/project_storages/\u003cA_ps_id\u003e 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's project_folder_id into the attacker's Storages::ProjectStorage row. The next managed-folder sync overwrites the ACL on the referenced folder with the attacker project's user list. This vulnerability is fixed in 17.3.3 and 17.4.1.","status":"published","published":"2026-06-26T18:59:27.758Z","modified":"2026-06-29T12:05:20.976Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T13:40:57.334596Z"}],"euvd":[{"id":"EUVD-2026-39870","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/\u003cA\u003e/settings/project_storages/\u003cA_ps_id\u003e 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's project_folder_id into the attacker's Storages::ProjectStorage row. The next managed-folder sync overwrites the ACL on the referenced folder with the attacker project's user list. This vulnerability is fixed in 17.3.3 and 17.4.1.","status":"published","published":"2026-06-26T18:59:27Z","modified":"2026-06-29T12:05:20Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T18:20:23.349194Z"}],"nvd":[{"id":"CVE-2026-52782","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/\u003cA\u003e/settings/project_storages/\u003cA_ps_id\u003e 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's project_folder_id into the attacker's Storages::ProjectStorage row. The next managed-folder sync overwrites the ACL on the referenced folder with the attacker project's user list. This vulnerability is fixed in 17.3.3 and 17.4.1.","status":"published","published":"2026-06-26T20:17:18.737Z","modified":"2026-10-25T17:10:00.197Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T14:12:26.508751Z"}],"osv":[{"id":"CVE-2026-52782","title":"OpenProject: IDOR through /projects/\u003cA\u003e/settings/project_storages/\u003cA_ps_id\u003e via PATCH parameter \"storages_project_storage[project_folder_id]\" leads to Access to Unauthorized Resources","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/\u003cA\u003e/settings/project_storages/\u003cA_ps_id\u003e 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's project_folder_id into the attacker's Storages::ProjectStorage row. The next managed-folder sync overwrites the ACL on the referenced folder with the attacker project's user list. This vulnerability is fixed in 17.3.3 and 17.4.1.","status":"published","published":"2026-06-26T18:59:27.758Z","modified":"2026-10-28T02:31:11.023494336Z","cvss":[{"version":"3.1","score":9.9,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","level":"critical"}],"cwes":["CWE-639"],"updated_at":"2026-11-02T15:45:07.431113Z"}]}}