CVE-2026-71285

Description

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.

References

https://github.com/louislam/uptime-kuma/blob/master/server/analytics/matomo-analytics.js

https://github.com/louislam/uptime-kuma

Details

Source: Mitre, NVD

Risk Information

CVSS v2

CVSS v3

EPSS