CVE-2026-71285
Uptime Kuma Stored XSS via Matomo Analytics Site ID on Public Status Pages
CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th
Uptime Kuma's Matomo analytics integration (server/analytics/matomo-analytics.js) 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.
| CWE | CWE-79 |
| Vendor | louislam |
| Product | uptime-kuma |
| Published | Aug 5, 2026 |
| Last Updated | Aug 10, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
louislam / uptime-kuma
0 ≤ 2.4.0
References
Credits
Alibek Baxtiyorov