CVE-2023-36821

Public Exploit
Uptime Kuma vulnerable to authenticated remote code execution via malicious plugin installation

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.

Category

8.8
CVSS
Severity: High
CVSS 3.1 •
EPSS 1.76% Top 20%
Vendor Advisory github.com
Affected: louislam uptime-kuma
Published at:
Updated at:

References

Link Tags
https://github.com/louislam/uptime-kuma/security/advisories/GHSA-7grx-f945-mj96 vendor advisory exploit
https://github.com/louislam/uptime-kuma/pull/3346 patch
https://github.com/louislam/uptime-kuma/blob/8c60e902e1c76ecbbd1b0423b07ce615341cb850/server/plugins-manager.js#L210-L216 product
https://github.com/louislam/uptime-kuma/releases/tag/1.22.1 release notes

Frequently Asked Questions

What is the severity of CVE-2023-36821?
CVE-2023-36821 has been scored as a high severity vulnerability.
How to fix CVE-2023-36821?
To fix CVE-2023-36821, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-36821 being actively exploited in the wild?
It is possible that CVE-2023-36821 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~2% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-36821?
CVE-2023-36821 affects louislam uptime-kuma.
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