CVE-2020-7685: UmbracoForms Insecure Defaults Vulnerability

HIGH
Advisory Identifier: GHSA-8m73-w2r2-6xxj
Share
CVSS 7.5
CWE-1188
Published
Advisory Summary

CVE-2020-7685 is a HIGH (CVSS 7.5) insecure defaults vulnerability (CWE-1188: Initialization of a Resource with an Insecure Default) affecting UmbracoForms libraries in the NuGet ecosystem. The issue involves insecure defaults in umbracoforms. Remediation is available in the latest vendor maintenance releases.

CVE-2020-7685 at a Glance

CVE Identifier CVE-2020-7685
GHSA Identifier GHSA-8m73-w2r2-6xxj
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-1188: Initialization of a Resource with an Insecure Default
Affected Product UmbracoForms
Package Ecosystem NuGet
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity High (I:H)
Availability None (A:N)

How to Fix CVE-2020-7685

To remediate this vulnerability, upgrade all affected UmbracoForms dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

UmbracoForms fixed: Latest secure release 
Upgrade UmbracoForms to Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for UmbracoForms

How to Check if You Are Affected

To determine whether your application is affected by CVE-2020-7685, inspect your project dependencies for UmbracoForms:

inspect dependencies for UmbracoForms

Analyze the terminal output to locate any version of UmbracoForms in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-1188: Initialization of a Resource with an Insecure Default, where the product initializes or sets a resource with a default that is intended to be changed by the product's installer, administrator, or maintainer, but the default is not secure. In UmbracoForms, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

This affects all versions of package UmbracoForms. When using the default configuration for upload forms, it is possible to upload arbitrary file types. The package offers a way for users to mitigate the issue. The users of this package can create a custom workflow and frontend validation that blocks certain file types, depending on their security needs and policies.

CVE-2020-7685 Affected UmbracoForms Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
UmbracoForms
nuget/UmbracoForms
NuGet
≤ 8.4.1

References

NVD — CVE-2020-7685 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-7685
snyk.io/vuln/snyk-dotnet-um... WEB
https://snyk.io/vuln/SNYK-DOTNET-UMBRACOFORMS-595765

Frequently Asked Questions

What is CVE-2020-7685?
CVE-2020-7685 is a security vulnerability in UmbracoForms involving Insecure defaults in UmbracoForms under CWE-1188: Initialization of a Resource with an Insecure Default.
Which UmbracoForms versions are affected?
Affected versions include releases prior to current release patches across affected packages: UmbracoForms.
What version fixes CVE-2020-7685?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is UmbracoForms affected?
Yes, UmbracoForms is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of CVE-2020-7685?
CVE-2020-7685 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.
What CWE is associated with CVE-2020-7685?
CVE-2020-7685 is classified under CWE-1188: Initialization of a Resource with an Insecure Default (The product initializes or sets a resource with a default that is intended to be changed by the product's installer, administrator, or maintainer, but the default is not secure.).
How can I check NuGet dependencies for CVE-2020-7685?
Run the dependency tree command: 'inspect dependencies for UmbracoForms'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-8m73-w2r2-6xxj",
  "modified" : "2023-03-03T00:01:57Z",
  "published" : "2020-07-29T17:29:51Z",
  "aliases" : [ "CVE-2020-7685" ],
  "summary" : "Insecure defaults in UmbracoForms",
  "details" : "This affects all versions of package UmbracoForms. When using the default configuration for upload forms, it is possible to upload arbitrary file types. The package offers a way for users to mitigate the issue. The users of this package can create a custom workflow and frontend validation that blocks certain file types, depending on their security needs and policies.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "NuGet",
      "name" : "UmbracoForms"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "last_affected" : "8.4.1"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-7685"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-DOTNET-UMBRACOFORMS-595765"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1188" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-07-29T17:28:16Z",
    "nvd_published_at" : "2020-07-28T17:15:00Z"
  }
}