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CVE-2021-41238

8.6 · HIGH

Hangfire is an open source system to perform background job processing in a .NET or .NET Core applications.

Published Nov 2, 2021CWE-862EPSS 0.96%

Overview

CVE-2021-41238 is a high-severity vulnerability. It was published on November 2, 2021 and has a CVSS 3.1 base score of 8.6 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.6, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Hangfire is an open source system to perform background job processing in a .NET or .NET Core applications. No Windows Service or separate process required. Dashboard UI in Hangfire.Core uses authorization filters to protect it from showing sensitive data to unauthorized users. By default when no custom authorization filters specified, `LocalRequestsOnlyAuthorizationFilter` filter is being used to allow only local requests and prohibit all the remote requests to provide sensible, protected by default settings. However due to the recent changes, in version 1.7.25 no authorization filters are used by default, allowing remote requests to succeed. If you are using `UseHangfireDashboard` method with default `DashboardOptions.Authorization` property value, then your installation is impacted. If any other authorization filter is specified in the `DashboardOptions.Authorization` property, the you are not impacted. Patched versions (1.7.26) are available both on Nuget.org and as a tagged releas

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/HangfireIO/Hangfire/issues/1958GitHubgithub.com/HangfireIO/Hangfire/security/advisories/GHSA-7rq6-7gv8-c37hGitHubgithub.com/HangfireIO/Hangfire/issues/1958GitHubgithub.com/HangfireIO/Hangfire/security/advisories/GHSA-7rq6-7gv8-c37h

How CyberStrike helps

Frequently asked questions

What is CVE-2021-41238?

CVE-2021-41238 is a high-severity vulnerability. It was published on November 2, 2021 and has a CVSS 3.1 base score of 8.6 (HIGH).

How severe is CVE-2021-41238?

This vulnerability has a CVSS 3.1 base score of 8.6, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2021-41238?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-41238?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-41238 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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