Detections
Analytics

Mozilla Firefox < 138.0.4

high Nessus Plugin ID 236891

Synopsis

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

Description

The version of Firefox installed on the remote macOS or Mac OS X host is prior to 138.0.4. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-36 advisory.

 - An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. (CVE-2025-4921)

 - An attacker was able to perform an out-of-bounds read or write on a JavaScript `Promise` object.
 (CVE-2025-4920)

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 Firefox version 138.0.4 or later.

See Also

https://www.mozilla.org/en-US/security/advisories/mfsa2025-36/

Plugin Details

Severity: High

ID: 236891

File Name: macos_firefox_138_0_4.nasl

Version: 1.1

Type: local

Agent: macosx

Published: 5/17/2025

Updated: 5/17/2025

Supported Sensors: Nessus Agent, Nessus

Risk Information

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2025-4921

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

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

Vulnerability Information

CPE: cpe:/a:mozilla:firefox

Required KB Items: MacOSX/Firefox/Installed

Exploit Ease: No known exploits are available

Patch Publication Date: 5/17/2025

Vulnerability Publication Date: 5/17/2025

Reference Information

CVE: CVE-2025-4920, CVE-2025-4921