CVE-2026-48081 OpenReception vulnerable to stored click-triggered XSS via javascript: tenant links rendered into patient-facing footer
Tenant admins can inject JavaScript via tenant links, allowing attackers to read patient plaintext data before encryption in the patient browser.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-48081?
CVE-2026-48081 is a high-severity cross-site scripting vulnerability in open-reception appointment-booking-software, published on 6 Aug 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
OpenReception's appointment booking software provides an end-to-end encrypted appointment booking platform. Prior to version 1.0.2, a TENANT_ADMIN can store `javascript:` URLs in the tenant `links` configuration (`website`, `imprint`, `privacyStatement`). These values are returned to the patient-facing landing page via `/api/public`, hydrated into the SvelteKit Button component, and rendered as `<a href="javascript:...">` elements without URL-scheme filtering. A patient who clicks any such link executes the attacker's JavaScript inside the patient browser origin, where patient form data is read before client-side encryption is applied. This breaks the project's central trust claim that the server is an untrusted relay and that administrators cannot read patient data. Patient-side encryption happens after form input, so JavaScript executing in the patient origin can read or alter the plaintext before encryption is performed. Version 1.0.2 fixes the issue.
Weakness: CWE-79
Which versions are affected by CVE-2026-48081?
How do I fix CVE-2026-48081?
No fix has been published for CVE-2026-48081 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-48081 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-48081 exists.
Sources
Also known as GHSA-xpr7-wx69-mp36.