### [CVE-2018-12372](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12372)
![](https://img.shields.io/static/v1?label=Product&message=Thunderbird&color=blue)
![](https://img.shields.io/static/v1?label=Version&message=%3C%2052.9%20&color=brighgreen)
![](https://img.shields.io/static/v1?label=Vulnerability&message=S%2FMIME%20and%20PGP%20decryption%20oracles%20can%20be%20built%20with%20HTML%20emails&color=brighgreen)

### Description

Decrypted S/MIME parts, when included in HTML crafted for an attack, can leak plaintext when included in a a HTML reply/forward. This vulnerability affects Thunderbird < 52.9.

### POC

#### Reference
- https://bugzilla.mozilla.org/show_bug.cgi?id=1419417
- https://bugzilla.mozilla.org/show_bug.cgi?id=1419417
- https://usn.ubuntu.com/3714-1/
- https://usn.ubuntu.com/3714-1/

#### Github
No PoCs found on GitHub currently.