#VU53308 Cleartext storage of sensitive information in Mozilla Thunderbird

Published: 2021-05-17 | Updated: 2021-06-07

Vulnerability identifier: #VU53308

Vulnerability risk: Low

CVSSv3.1: 2.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-29956


Exploitation vector: Local

Exploit availability: No

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

Vendor: Mozilla


The vulnerability allows a local user to gain access to sensitive information.

The vulnerability exists due to OpenPGP secret keys that were imported using Thunderbird. were stored unencrypted on the user's local disk. The master password protection was inactive for those keys. A local user can gain access to sensitive information.

Install updates from vendor's website.

Vulnerable software versions

Mozilla Thunderbird: 78.8.1 - 78.10.1

External links

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

Latest bulletins with this vulnerability