Uptime Kuma vulnerable to authenticated remote code execution via malicious plugin installation
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| louislam | uptime-kuma | before 1.22.1 | 1.22.1 | Patch available | CNA |
| — | uptime-kuma (npm) | before 1.22.1 | 1.22.1 | Patch available | GHSA-7grx-f945-mj96 |
- uptime-kuma Vendorlouislam Affected before 1.22.1 Fixed in 1.22.1 Patch available CNA
- uptime-kuma (npm) Vendor— Affected before 1.22.1 Fixed in 1.22.1 Patch available GHSA-7grx-f945-mj96
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:uptime-kuma_project:uptime-kuma:*:*:*:*:*:*:*:* | before 1.22.1 | Vulnerable | Uptime-kuma Project |
- cpe:2.3:a:uptime-kuma_project:uptime-kuma:*:*:*:*:*:*:*:* Versions before 1.22.1 Vulnerable ·Uptime-kuma Project
Remediation
- Fix · CNA uptime-kuma (louislam) Fixed in 1.22.1
- Fix · GHSA-7grx-f945-mj96 uptime-kuma (npm) Fixed in 1.22.1 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2023-36821
- 2026-10-03 Alias added: GHSA-7grx-f945-mj96
References
Other 4
- https://github.com/louislam/uptime-kuma/blob/8c60e902e1c76ecbbd1b0423b07ce615341cb850/server/plugins-manager.js#L210-L216
- https://github.com/louislam/uptime-kuma/releases/tag/1.22.1
- https://github.com/louislam/uptime-kuma/commit/a0736e04b2838aae198c2110db244eab6f87757b
- https://github.com/louislam/uptime-kuma
More louislam vulnerabilities
- TI-2026-51249 Path traversal in louislam dockge CVSS 4.0HIGH 8.7
- TI-2024-37292 Local File Inclusion (LFI) via Improper URL Handling in uptime-kuma's `Real-Browser` monitor CVSS 3.1MEDIUM 6.8
- TI-2026-49952 Uptime Kuma Stored XSS via Matomo Analytics Site ID on Public Status Pages CVSS 3.1HIGH 8.1
- TI-2026-83016 Race condition in Uptime Kuma lets attackers create extra admins CVSS 4.0MEDIUM 6.3
Sources
- CVE-2023-36821 · CVE Program
- CVE-2023-36821 · NVD
- FIRST EPSS
- GHSA-7grx-f945-mj96 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences