VULNERABILITY INTELLIGENCE
CVE-2026-71285
CVSS score8.1 HIGH
EPSS probability0.38%
CISA KEVNot currently listed
Published2026-08-05
Last modified2026-10-23
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N
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.
Weakness classification
- 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c: CWE-79