CVE-2020-26174
CVSS v3
8.8
HIGH
EPSS Score
1.2 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
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.
Technical details
- Published
- 2020-12-18
Frequently asked questions
What is CVE-2020-26174?
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.
Is CVE-2020-26174 actively exploited?
Active exploitation of CVE-2020-26174 has not been confirmed. Its EPSS score was 1.2% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2020-26174?
CVE-2020-26174 has a CVSS v3 base score of 8.8 (HIGH severity).
Is CVE-2020-26174 affecting your environment?
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