{"id":"CVE-2020-26176","aliases":["EUVD-2020-18801","GHSA-w664-p7q3-cm25"],"status":"published","title":"An issue was discovered in tangro Business Workflow before 1.18.1. No (or broken) access control...","description":"An issue was discovered in tangro Business Workflow before 1.18.1. No (or broken) access control checks exist on the /api/document/\u003cDocumentID\u003e/attachments API endpoint. Knowing a document ID, an attacker can list all the attachments of a workitem, including their respective IDs. This allows the attacker to gather valid attachment IDs for workitems that do not belong to them.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AC:L/AV:N/A:N/C:L/I:N/PR:L/S:U/UI:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00754,"percentile":0.55524,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-922"],"published":"2020-12-18T09:26:48Z","modified":"2026-06-17T03:07:45Z","products":[{"vendor":"tangro","product":"business_workflow"}],"references":[{"url":"https://www.tangro.de/","tags":["x_refsource_MISC","x_transferred","Product"]},{"url":"https://blog.to.com/advisory-tangro-bwf-1-17-5-multiple-vulnerabilities/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-26176"},{"url":"https://github.com/advisories/GHSA-w664-p7q3-cm25"}],"sources":{"cve":[{"id":"CVE-2020-26176","description":"An issue was discovered in tangro Business Workflow before 1.18.1. No (or broken) access control checks exist on the /api/document/\u003cDocumentID\u003e/attachments API endpoint. Knowing a document ID, an attacker can list all the attachments of a workitem, including their respective IDs. This allows the attacker to gather valid attachment IDs for workitems that do not belong to them.","status":"published","published":"2020-12-18T09:26:48Z","modified":"2024-08-04T15:49:07.145Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AC:L/AV:N/A:N/C:L/I:N/PR:L/S:U/UI:N","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:35:46.129376Z"}],"euvd":[{"id":"EUVD-2020-18801","description":"An issue was discovered in tangro Business Workflow before 1.18.1. No (or broken) access control checks exist on the /api/document/\u003cDocumentID\u003e/attachments API endpoint. Knowing a document ID, an attacker can list all the attachments of a workitem, including their respective IDs. This allows the attacker to gather valid attachment IDs for workitems that do not belong to them.","status":"published","published":"2020-12-18T09:26:48Z","modified":"2024-08-04T15:49:07Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AC:L/AV:N/A:N/C:L/I:N/PR:L/S:U/UI:N","level":"medium"}],"updated_at":"2026-11-03T03:07:15.778249Z"}],"ghsa":[{"id":"GHSA-w664-p7q3-cm25","title":"An issue was discovered in tangro Business Workflow before 1.18.1. No (or broken) access control...","description":"An issue was discovered in tangro Business Workflow before 1.18.1. No (or broken) access control checks exist on the /api/document/\u003cDocumentID\u003e/attachments API endpoint. Knowing a document ID, an attacker can list all the attachments of a workitem, including their respective IDs. This allows the attacker to gather valid attachment IDs for workitems that do not belong to them.","status":"published","published":"2022-05-24T17:36:54Z","modified":"2023-01-29T05:04:48Z","cwes":["CWE-922"],"updated_at":"2026-11-02T14:45:38.359776Z"}],"nvd":[{"id":"CVE-2020-26176","description":"An issue was discovered in tangro Business Workflow before 1.18.1. No (or broken) access control checks exist on the /api/document/\u003cDocumentID\u003e/attachments API endpoint. Knowing a document ID, an attacker can list all the attachments of a workitem, including their respective IDs. This allows the attacker to gather valid attachment IDs for workitems that do not belong to them.","status":"published","published":"2020-12-18T10:15:13.087Z","modified":"2026-06-17T03:07:45.567Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-922"],"updated_at":"2026-11-02T14:06:27.73474Z"}]}}