How severe is CVE-2020-26176?

CVE-2020-26176 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2020-26176 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-26176?

CVE-2020-26176 affects Tangro Business Workflow. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-26176?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-26176 published?

CVE-2020-26176 was published on 2020-12-18 and last updated on 2026-06-17.

CVE-2020-26176

CVE-2020-26176 is a medium-severity vulnerability in Tangro Business Workflow with a CVSS 3.x base score of 4.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-922.

Key facts

Severity: Medium (CVSS 3.x base score 4.3)
CVSS v2: 4.0
EPSS exploit prediction: 1% (50th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-922
Affected product: Tangro Business Workflow
Published: 2020-12-18
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2020-26176?: 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.
How severe is CVE-2020-26176?: CVE-2020-26176 has a CVSS 3.x base score of 4.3, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2020-26176 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (50th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-26176?: CVE-2020-26176 affects Tangro Business Workflow. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-26176?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-26176 published?: CVE-2020-26176 was published on 2020-12-18 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:tangro:business_workflow:*:*:*:*:*:*:*:*

More vulnerabilities in Tangro Business Workflow

CVE-2020-26174 — High (CVSS 8.8): tangro Business Workflow before 1.18.1 requests a list of allowed filetypes from the server and restricts uploads to…
CVE-2020-26175 — Medium (CVSS 6.5): In tangro Business Workflow before 1.18.1, an attacker can manipulate the value of PERSON in requests to /api/profile…
CVE-2020-26178 — Medium (CVSS 5.3): In tangro Business Workflow before 1.18.1, knowing an attachment ID, it is possible to download workitem attachments…
CVE-2020-26177 — Medium (CVSS 4.3): In tangro Business Workflow before 1.18.1, a user's profile contains some items that are greyed out and thus are not…
CVE-2020-26171 — Medium (CVSS 4.3): In tangro Business Workflow before 1.18.1, the documentId of attachment uploads to /api/document/attachments/upload can…
CVE-2020-26172 — Medium (CVSS 4.2): Every login in tangro Business Workflow before 1.18.1 generates the same JWT token, which allows an attacker to reuse…

All CVEs affecting Tangro Business Workflow →

Other CWE-922 vulnerabilities

CVE-2025-12539 — Critical (CVSS 10.0): The TNC Toolbox: Web Performance plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions…
CVE-2023-32191 — Critical (CVSS 9.9): When RKE provisions a cluster, it stores the cluster state in a configmap called `full-cluster-state` inside the…
CVE-2023-29727 — Critical (CVSS 9.8): The Call Blocker application 6.6.3 for Android allows unauthorized applications to use exposed components to delete…
CVE-2021-42371 — Critical (CVSS 9.8): lpar2rrd is a hardcoded system account in XoruX LPAR2RRD and STOR2RRD before 7.30.
CVE-2021-27170 — Critical (CVSS 9.8): An issue was discovered on FiberHome HG6245D devices through RP2613. By default, there are no firewall rules for IPv6…
CVE-2020-8481 — Critical (CVSS 9.8): For ABB products ABB Ability™ System 800xA and related system extensions versions 5.1, 6.0 and 6.1, Compact HMI…

Browse all CWE-922 vulnerabilities →