CVE-2025-63842 Cross-site scripting in web backend
Remote authenticated users can execute arbitrary JavaScript in the Repetico Android app via crafted input in question fields.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-63842?
CVE-2025-63842 is a medium-severity cross-site scripting vulnerability in Repetico web backend, published on 13 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
A Cross-Site Scripting (XSS) vulnerability in the web backend for the Repetico app 1.9.7.31 for Android allows a remote authenticated user to execute arbitrary JavaScript code in the app's context via crafted input in the multiple-choice question text field.
Weakness: CWE-79
Which versions are affected by CVE-2025-63842?
How do I fix CVE-2025-63842?
No fix has been published for CVE-2025-63842 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-2025-63842 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-63842 exists.
Sources
Also known as GHSA-2xp8-xg4h-rrr9.