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CVE-2020-26176

MEDIUM
4.3
CVSS Score
Published: December 18, 2020 at 09:26 AM UTC
Updated: June 17, 2026 at 03:07 AM UTC
1 product affected across 1 vendorBusiness Workflow

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.8%

Description

An issue was discovered in tangro Business Workflow before 1.18.1. No (or broken) access control checks exist on the /api/document/<DocumentID>/attachments API endpoint. Knowing a document ID, an attacker can list all the attachments of a workitem, including their respective IDs. This allows the attacker to gather valid attachment IDs for workitems that do not belong to them.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Business Workflow· Tangro
95%
v < 1.18.1
Affected range stops below 1.18.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (2)

x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://blog.to.com/advisory-tangro-bwf-1-17-5-multiple-vulnerabilities/
x_refsource_MISCProduct
Source: [email protected]
https://www.tangro.de/

CVSS

4.3MEDIUMmitre
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-922

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