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CVE-2023-36821

8.8 · HIGH

Uptime Kuma, a self-hosted monitoring tool, allows an authenticated attacker to install a maliciously crafted plugin in versions prior to 1.22.1, which may lead to remote code execution.

Published Jul 5, 2023CWE-20EPSS 2.02%

Overview

CVE-2023-36821 is a high-severity vulnerability. It was published on July 5, 2023 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Uptime Kuma, a self-hosted monitoring tool, allows an authenticated attacker to install a maliciously crafted plugin in versions prior to 1.22.1, which may lead to remote code execution. Uptime Kuma allows authenticated users to install plugins from an official list of plugins. This feature is currently disabled in the web interface, but the corresponding API endpoints are still available after login. After downloading a plugin, it's installed by calling `npm install` in the installation directory of the plugin. Because the plugin is not validated against the official list of plugins or installed with `npm install --ignore-scripts`, a maliciously crafted plugin taking advantage of npm scripts can gain remote code execution. Version 1.22.1 contains a patch for this issue.

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/louislam/uptime-kuma/blob/8c60e902e1c76ecbbd1b0423b07ce615341cb850/server/plugins-manager.js#L210-L216GitHubgithub.com/louislam/uptime-kuma/pull/3346GitHubgithub.com/louislam/uptime-kuma/releases/tag/1.22.1GitHubgithub.com/louislam/uptime-kuma/security/advisories/GHSA-7grx-f945-mj96GitHubgithub.com/louislam/uptime-kuma/blob/8c60e902e1c76ecbbd1b0423b07ce615341cb850/server/plugins-manager.js#L210-L216GitHubgithub.com/louislam/uptime-kuma/pull/3346GitHubgithub.com/louislam/uptime-kuma/releases/tag/1.22.1GitHubgithub.com/louislam/uptime-kuma/security/advisories/GHSA-7grx-f945-mj96

How CyberStrike helps

Frequently asked questions

What is CVE-2023-36821?

CVE-2023-36821 is a high-severity vulnerability. It was published on July 5, 2023 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2023-36821?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2023-36821?

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-2023-36821?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-36821 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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