CVE-2023-36821
HighCVSS 8.8Exploitation Probability (EPSS)
Elevated risk74th percentile - higher than 74% of all known CVEs
Summary
Uptime Kuma, a 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. Although the plugin installation feature is currently disabled in the web interface, the corresponding API endpoints are still available after login.
Risk Assessment
A maliciously crafted plugin could allow an attacker to execute remote code, posing a serious threat to the security of the system and the organization's data.
Recommendation
It is recommended to update Uptime Kuma to version 1.22.1 or later to patch this vulnerability. Additionally, consider restricting API access for authenticated users.
Other vulnerabilities in Uptime Kuma
See all- CVE-2026-71285High
Uptime Kuma's Matomo analytics integration injects the admin-configurable Matomo value as a bare, unquoted JavaScript expression inside a <script> block rendered on every public status page. A siteId value such as , once saved by an editor/admin, executes arbitrary JavaScript for every unauthenticated visitor of the public /status/<slug> page, enabling session-cookie theft and full page takeover.
- CVE-2023-36822Medium
Uptime Kuma, a monitoring tool, has a path traversal vulnerability in versions prior to 1.22.1. This allows authenticated users to delete files from the server, potentially leading to data loss and system unavailability.
Original NVD description (English source)
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.