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.
- 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
- None listed
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
Which versions are affected by CVE-2021-47768?
It affects 1 product.
Products include 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.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2021-47768 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-47768 exists.
Sources
Also known as GHSA-p9hc-mmh6-475f.