CVE-2020-26174: Tangro Business Workflow

High severity, CVSS 8.8. EPSS: 1.2% chance of exploitation in the next 30 days.

tangro Business Workflow before 1.18.1 requests a list of allowed filetypes from the server and restricts uploads to the filetypes contained in this list. However, this restriction is enforced in the browser (client-side) and can be circumvented. This allows an attacker to upload any file as an attachment to a workitem.

Affected products

• Tangro Business Workflow: before 1.18.1 (fixed in 1.18.1)

Published 2020-12-18. Last modified 2026-06-17.