CVE-2020-26171

Name: CVE-2020-26171
Creator: NVD / NIST
Published: 2020-12-18T10:15:12.383+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.3/10EPSS 0.57%

Last modified Jun 17, 2026

CVE-2020-26171 is a medium-severity vulnerability rated 4.3/10 on the CVSS scale. In tangro Business Workflow before 1.18.1, the documentId of attachment uploads to /api/document/attachments/upload can be manipulated. By doing this, users can add attachments to workitems that do not belong to them.. EPSS estimates a 0.57% chance of exploitation in the next 30 days.

Description

In tangro Business Workflow before 1.18.1, the documentId of attachment uploads to /api/document/attachments/upload can be manipulated. By doing this, users can add attachments to 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:N/I:L/A:N

EPSS Probability

0.57%

43.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-639

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-2020-26171?

How severe is CVE-2020-26171?

CVE-2020-26171 has a CVSS score of 4.3/10 (MEDIUM severity). The EPSS model estimates a 0.57% probability of exploitation in the next 30 days.

How do I fix CVE-2020-26171?

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-2020-26171?

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

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Source: NVD / NIST