CVE-2020-26176

Name: CVE-2020-26176
Creator: NVD / NIST
Published: 2020-12-18T10:15:13.087+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.74%

Last modified Jun 17, 2026

CVE-2020-26176 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. 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. EPSS estimates a 0.74% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

4.3/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS Probability

0.74%

50.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-922

Affected Software

Vendor	Product	Versions
Tangro	Business Workflow	< 1.18.1

References

https://blog.to.com/advisory-tangro-bwf-1-17-5-multiple-vulnerabilities/Exploit, Third Party Advisory
https://www.tangro.de/Product
https://blog.to.com/advisory-tangro-bwf-1-17-5-multiple-vulnerabilities/Exploit, Third Party Advisory
https://www.tangro.de/Product

Timeline

Published: Dec 18, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-26176?

How severe is CVE-2020-26176?

CVE-2020-26176 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.74% probability of exploitation in the next 30 days.

How do I fix CVE-2020-26176?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-26176?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST