# CVE-2021-47768: ImportExportTools NG 10.0.4 - HTML Injection

> Attackers can inject malicious HTML via email subjects that executes during export, potentially stealing user data or credentials in Thunderbird.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **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:** No
- **Published:** 15 Jan 2026
- **Updated:** 15 Jan 2026
- **Also known as:** GHSA-p9hc-mmh6-475f

## What is CVE-2021-47768?

CVE-2021-47768 is a medium-severity cross-site scripting vulnerability in thundernest ImportExportTools NG, published on 15 Jan 2026. 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

ImportExportTools NG 10.0.4 contains a persistent HTML injection vulnerability in the email export module that allows remote attackers to inject malicious HTML payloads. Attackers can send emails with crafted HTML in the subject that execute during HTML export, potentially compromising user data or session credentials.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2021-47768?

It affects 1 product.


Products: Cleidigh Importexporttools Ng.

## How do I fix CVE-2021-47768?

No fix has been published for CVE-2021-47768 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-47768 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47768 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-47768 and fix it if it is affected.

What it is: CVE-2021-47768 is a medium-severity cross-site scripting vulnerability in thundernest ImportExportTools NG, published on 15 Jan 2026. 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-2021-47768 exists.

Affected product: thundernest ImportExportTools NG. 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-2021-47768/ (Markdown: https://insights.sbomify.com/CVE-2021-47768/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-47768
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-47768
- OSV: https://osv.dev/vulnerability/CVE-2021-47768

---
From sbomify Insights: https://insights.sbomify.com/CVE-2021-47768/
Summaries are generated and may contain mistakes; the official description above is the record.