Detections
Analytics

Mozilla Thunderbird < 139.0

high Nessus Plugin ID 237386

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Synopsis

A mail client installed on the remote macOS or Mac OS X host is affected by multiple vulnerabilities.

Description

The version of Thunderbird installed on the remote macOS or Mac OS X host is prior to 139.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-45 advisory.

 - In certain cases, SNI could have been sent unencrypted even when encrypted DNS was enabled.
 (CVE-2025-5270)

 - A double-free could have occurred in `vpxcodecencinitmulti` after a failed allocation when initializing the encoder for WebRTC. This could have caused memory corruption and a potentially exploitable crash.
 (CVE-2025-5262)

 - Error handling for script execution was incorrectly isolated from web content, which could have allowed cross-origin leak attacks. (CVE-2025-5263)

 - Due to insufficient escaping of the newline character in the Copy as cURL feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system.
 (CVE-2025-5264)

 - Due to insufficient escaping of the ampersand character in the Copy as cURL feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's system.
 This bug only affects Firefox for Windows. Other versions of Firefox are unaffected. (CVE-2025-5265)

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

Solution

Upgrade to Mozilla Thunderbird version 139.0 or later.

See Also

https://www.mozilla.org/en-US/security/advisories/mfsa2025-45/

Plugin Details

Severity: High

ID: 237386

File Name: macos_thunderbird_139_0.nasl

Version: 1.2

Type: local

Agent: macosx

Published: 5/27/2025

Updated: 5/30/2025

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2025-5270

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:mozilla:thunderbird

Required KB Items: MacOSX/Thunderbird/Installed

Exploit Ease: No known exploits are available

Patch Publication Date: 5/27/2025

Vulnerability Publication Date: 5/27/2025

Reference Information

CVE: CVE-2025-5262, CVE-2025-5263, CVE-2025-5264, CVE-2025-5265, CVE-2025-5266, CVE-2025-5267, CVE-2025-5268, CVE-2025-5270, CVE-2025-5271, CVE-2025-5272

IAVA: 2025-A-0382