#VU50038 Code Injection in Mozilla Thunderbird

Published: 2021-01-26

Vulnerability identifier: #VU50038

Vulnerability risk: Medium


CVE-ID: CVE-2020-15685


Exploitation vector: Network

Exploit availability:

Vulnerable software:
Mozilla Thunderbird
Client/Desktop applications / Messaging software

Vendor: Mozilla


The vulnerability allows a remote attacker to bypass certain security restrictions.

The vulnerability exists due to improper input validation when processing plaintext phase of the IMAP STARTTLS connection setup. A remote attacker can pass protocol commands, which can be evaluated within the encrypted session.

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Vulnerable software versions

Mozilla Thunderbird: 78.0 - 78.6.1, 68.0 - 68.12.1, 60.0 - 60.9.1

Fixed software versions


External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

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