PatchTheCVECVE-2020-26174: tangro Business Workflow before 1.18.1 requests a list of allowed filetypes from the server and restricts uplo
CVE-2020-26174 is a high-severity flaw (CVSS 8.8) affecting business workflow. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- High severity
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 8.8 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 1.2% (top 31%) |
| CISA exploited list | No |
| Weakness | CWE-434 |
| Published | 2020-12-18 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2020-26174?
business workflow: upgrade to 1.18.1. Exact commands for each OS are on this page.
Is CVE-2020-26174 being exploited?
CVE-2020-26174 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2020-26174 affect?
CVE-2020-26174 affects business workflow. Severity is high (CVSS 8.8). 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 circumv
How urgent is CVE-2020-26174?
Priority 53/100. High severity; Public exploit reference
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