Mozilla Thunderbird < 78.8.1

high Nessus Plugin ID 275635

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Synopsis

A mail client installed on the remote Windows host is affected by a vulnerability.

Description

The version of Thunderbird installed on the remote Windows host is prior to 78.8.1. It is, therefore, affected by a vulnerability as referenced in the mfsa2021-17 advisory.

- Thunderbird unprotects a secret OpenPGP key prior to using it for a decryption, signing or key import task. If the task runs into a failure, the secret key may remain in memory in its unprotected state.
(CVE-2021-29950)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade to Mozilla Thunderbird version 78.8.1 or later.

Plugin Details

Severity: High

ID: 275635

File Name: mozilla_thunderbird_78_8_1.nasl

Version: 1.1

Type: local

Agent: windows

Family: Windows

Published: 11/18/2025

Updated: 11/18/2025

Supported Sensors: Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.9

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS Score Source: CVE-2021-29950

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:mozilla:thunderbird

Required KB Items: installed_sw/Mozilla Thunderbird

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/8/2021

Vulnerability Publication Date: 3/8/2021

Reference Information

CVE: CVE-2021-29950

Detections

Analytics