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.
Metrics
Affected Vendors & Products
| Vendors | Products |
|---|---|
| Louislam |
|
No data.
No data.
References
History
Mon, 10 Aug 2026 12:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Uptime Kuma's Matomo analytics integration (server/analytics/matomo-analytics.js) injects the admin-configurable Matomo `siteId` value as a bare, unquoted JavaScript expression inside a <script> block rendered on every public status page: `_paq.push(['setSiteId', ${escapedSiteIdHTMLAttribute}]);`. The escaping pipeline used (jsesc with isScriptContext:true, then html-escaper.escape()) does not escape the characters `]`, `)`, `;`, `(`, which are sufficient to break out of the array/push expression context. A siteId value such as `1]);alert(document.cookie)//`, 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. | 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. |
| Title | Uptime Kuma - Stored XSS via Matomo Analytics Site ID on Public Status Pages | Uptime Kuma Stored XSS via Matomo Analytics Site ID on Public Status Pages |
Mon, 10 Aug 2026 11:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Title | Uptime Kuma Stored XSS via Matomo Analytics Site ID on Public Status Pages | Uptime Kuma - Stored XSS via Matomo Analytics Site ID on Public Status Pages |
Wed, 05 Aug 2026 16:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Wed, 05 Aug 2026 15:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Louislam
Louislam uptime-kuma |
|
| Vendors & Products |
Louislam
Louislam uptime-kuma |
Wed, 05 Aug 2026 13:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Uptime Kuma's Matomo analytics integration (server/analytics/matomo-analytics.js) injects the admin-configurable Matomo `siteId` value as a bare, unquoted JavaScript expression inside a <script> block rendered on every public status page: `_paq.push(['setSiteId', ${escapedSiteIdHTMLAttribute}]);`. The escaping pipeline used (jsesc with isScriptContext:true, then html-escaper.escape()) does not escape the characters `]`, `)`, `;`, `(`, which are sufficient to break out of the array/push expression context. A siteId value such as `1]);alert(document.cookie)//`, 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. | |
| Title | Uptime Kuma Stored XSS via Matomo Analytics Site ID on Public Status Pages | |
| Weaknesses | CWE-79 | |
| References |
| |
| Metrics |
cvssV3_1
|
MITRE
Status: PUBLISHED
Assigner: TuranSec
Published: 2026-08-05T12:26:30.908Z
Updated: 2026-08-10T11:47:12.802Z
Reserved: 2026-08-05T12:23:34.968Z
Link: CVE-2026-71285
Vulnrichment
Updated: 2026-08-05T15:52:08.105Z
NVD
Status : Received
Published: 2026-08-05T13:24:53.210
Modified: 2026-08-10T12:17:31.150
Link: CVE-2026-71285
Redhat
No data.