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CVE-2026-119552

Uptime Kuma through 2.5.8 Race Condition Admin Creation via Setup Handler

Uptime Kuma through 2.5.8 contains a race condition in the Socket.IO first-run setup handler that allows unauthenticated attackers to create an additional administrator account. Attackers can send concurrent setup requests during the bcrypt hashing window to bypass the empty user table check, then modify monitors, API keys, and enable disableAuth.

CVSS 4.0 · 6.3 Medium EPSS < 1% KEV · Not listed
Vendors
Uptime-kuma Project
Products
Uptime-kuma
CVE-2023-25810

Persistent Cross site scripting (XSS) through description in status page in Uptime Kuma

Uptime Kuma is a self-hosted monitoring tool. In versions prior to 1.20.0 the Uptime Kuma status page allows a persistent XSS attack. Users are advised to upgrade. There are no known workarounds for this vulnerability.

CVSS 3.1 · 6.3 Medium EPSS < 1% KEV · Not listed
Vendors
Uptime-kuma Project
Products
Uptime-kuma
CVE-2023-25811

Persistent Cross site scripting (XSS) in Uptime Kuma

Uptime Kuma is a self-hosted monitoring tool. In versions prior to 1.20.0 the Uptime Kuma `name` parameter allows a persistent XSS attack. Users are advised to upgrade. There are no known workarounds for this vulnerability.

CVSS 3.1 · 6.3 Medium EPSS < 1% KEV · Not listed
Vendors
Uptime-kuma Project
Products
Uptime-kuma
CVE-2023-36822

Uptime Kuma authenticated path traversal via plugin repository name may lead to unavailability or data loss

Uptime Kuma, a self-hosted monitoring tool, has a path traversal vulnerability in versions prior to 1.22.1. 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. Before a plugin is downloaded, the plugin installation directory is checked for existence. If it exists, it's removed before the plugin installation. Because the plugin is not validated against the official list of plugins or sanitized, the check for existence and the removal of the plugin installation directory are prone to path traversal. This vulnerability allows an authenticated attacker to delete files from the server Uptime Kuma is running on. Depending on which files are deleted, Uptime Kuma or the whole system may become unavailable due to data loss.

CVSS 3.1 · 6.5 Medium EPSS 1.2% KEV · Not listed
Vendors
Uptime-kuma Project
Products
Uptime-kuma
CVE-2023-36821

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

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.

CVSS 3.1 · 8.8 High EPSS 2.0% KEV · Not listed
Vendors
Uptime-kuma Project
Products
Uptime-kuma