CVE-2020-26176 json
An issue was discovered in tangro Business Workflow before 1.18.1.
published 2020-12-18 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-18801
- cvss
- 4.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 55%
- public exploits
- 0
- none known
Summary
An issue was discovered in tangro Business Workflow before 1.18.1. No (or broken) access control checks exist on the /api/document/<DocumentID>/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.
Patch / fix
- tangro business_workflow 1.18.1
Exploit prediction
0.75% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- blog.to.com https://blog.to.com/advisory-tangro-bwf-1-17-5-multiple-vulnerabilities/ referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 4.3 | CVSS:3.1/AC:L/AV:N/A:N/C:L/I:N/PR:L/S:U/UI:N |
| CNA | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| NVD | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
| NVD | 2.0 | 4.0 | AV:N/AC:L/Au:S/C:P/I:N/A:N |
Classification
- Weakness
-
- CWE-922 Insecure Storage of Sensitive Information
References
-
blog.to.com
/advisory-tangro-bwf-1-17-5-multiple-vulnerabilities/
exploit, third-party-advisory
-
tangro.de
/
product
Sources
- CVE List CVE-2020-26176
- NVD CVE-2020-26176
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