# CVE-2006-0884: Cross-site scripting in n/a

> Attackers can bypass JavaScript security settings and access sensitive data or crash the application by tricking users into editing malicious emails.

- **Severity:** Critical 9.3 (`AV:N/AC:M/Au:N/C:C/I:C/A:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 24 Feb 2006
- **Updated:** 7 Aug 2024
- **Also known as:** DEBIAN-CVE-2006-0884, GHSA-f48c-g7r5-vhv8

## What is CVE-2006-0884?

CVE-2006-0884 is a critical cross-site scripting vulnerability in Mozilla Thunderbird, published on 24 Feb 2006. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

The WYSIWYG rendering engine ("rich mail" editor) in Mozilla Thunderbird 1.0.7 and earlier allows user-assisted attackers to bypass javascript security settings and obtain sensitive information or cause a crash via an e-mail containing a javascript URI in the SRC attribute of an IFRAME tag, which is executed when the user edits the e-mail.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2006-0884?

It affects 1 product.


Products: Mozilla Thunderbird.

## How do I fix CVE-2006-0884?

Upgrade to a fixed version.

## Is CVE-2006-0884 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2006-0884 exists.

Public exploit code:

- Mozilla (Multiple Products) - iFrame JavaScript Execution (exploitdb)

## Other vulnerabilities in Mozilla Thunderbird

- [CVE-2026-92238](https://insights.sbomify.com/CVE-2026-92238/): Ambiguous parsing of mail headers (critical 9.8)
- [CVE-2026-84637](https://insights.sbomify.com/CVE-2026-84637/): Calendar invitation attachments could launch local executables (critical 9.8)
- [CVE-2021-43529](https://insights.sbomify.com/CVE-2021-43529/): Memory corruption in Thunderbird (critical 9.8)
- [CVE-2019-11703](https://insights.sbomify.com/CVE-2019-11703/): Memory corruption in Thunderbird (critical 9.8)
- [CVE-2019-11704](https://insights.sbomify.com/CVE-2019-11704/): Memory corruption in Thunderbird (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2006-0884 and fix it if it is affected.

What it is: CVE-2006-0884 is a critical cross-site scripting vulnerability in Mozilla Thunderbird, published on 24 Feb 2006. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2006-0884 exists.

Affected product: Mozilla Thunderbird. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2006-0884/ (Markdown: https://insights.sbomify.com/CVE-2006-0884/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2006-0884
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2006-0884
- OSV: https://osv.dev/vulnerability/CVE-2006-0884

---
From sbomify Insights: https://insights.sbomify.com/CVE-2006-0884/
Summaries are generated and may contain mistakes; the official description above is the record.