PatchTheCVECVE-2020-26171: In tangro Business Workflow before 1.18.1, the documentId of attachment uploads to /api/document/attachments/u
CVE-2020-26171 is a medium-severity flaw (CVSS 4.3) affecting business workflow. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 4.3 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | Low |
| User interaction | None |
| EPSS exploit chance | 0.6% (top 52%) |
| CISA exploited list | No |
| Weakness | CWE-639 |
| 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-2020-26171?
business workflow: upgrade to 1.18.1. Exact commands for each OS are on this page.
Is CVE-2020-26171 being exploited?
CVE-2020-26171 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-2020-26171 affect?
CVE-2020-26171 affects business workflow. Severity is medium (CVSS 4.3). 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.
How urgent is CVE-2020-26171?
Priority 32/100. Public exploit reference
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