### [CVE-2018-12373](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-12373)
![](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%20plaintext%20can%20be%20leaked%20through%20HTML%20reply%2Fforward&color=brighgreen)

### Description

dDecrypted S/MIME parts hidden with CSS or the plaintext HTML tag can leak plaintext when included in a HTML reply/forward. This vulnerability affects Thunderbird < 52.9.

### POC

#### Reference
- https://usn.ubuntu.com/3714-1/
- https://usn.ubuntu.com/3714-1/

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