Persistent Cross site scripting (XSS) in Uptime Kuma
Priority MEDIUM 61CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- Required
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · High · None
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00474 41st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed uptime-kuma (louislam): 1.20.0
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
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 1.20.0 | 1.20.0 | Patch available | CNA |
- uptime-kuma Vendorlouislam Affected before 1.20.0 Fixed in 1.20.0 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:uptime-kuma_project:uptime-kuma:*:*:*:*:*:*:*:* | before 1.20.0 | Vulnerable | Uptime-kuma Project |
- cpe:2.3:a:uptime-kuma_project:uptime-kuma:*:*:*:*:*:*:*:* Versions before 1.20.0 Vulnerable ·Uptime-kuma Project
Remediation
- Fix · CNA uptime-kuma (louislam) Fixed in 1.20.0
Timeline
- 2026-10-02 Threatist record created from CVE-2023-25811
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
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences