Detections
Analytics

Mozilla Firefox ESR < 115.21.1

critical Nessus Plugin ID 233425

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Synopsis

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

Description

The version of Firefox ESR installed on the remote macOS or Mac OS X host is prior to 115.21.1. It is, therefore, affected by a vulnerability as referenced in the mfsa2025-19 advisory.

 - Following the recent Chrome sandbox escape (CVE-2025-2783), various Firefox developers identified a similar pattern in our IPC code. A compromised child process could cause the parent process to return an unintentionally powerful handle, leading to a sandbox escape. The original vulnerability was being exploited in the wild. This only affects Firefox on Windows. Other operating systems are unaffected.
 (CVE-2025-2857)

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 Firefox ESR version 115.21.1 or later.

See Also

https://www.mozilla.org/en-US/security/advisories/mfsa2025-19/

Plugin Details

Severity: Critical

ID: 233425

File Name: macos_firefox_115_21_1_esr.nasl

Version: 1.2

Type: local

Agent: macosx

Published: 3/28/2025

Updated: 4/3/2025

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.2

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2025-2857

CVSS v3

Risk Factor: Critical

Base Score: 10

Temporal Score: 8.7

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

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

Vulnerability Information

CPE: cpe:/a:mozilla:firefox_esr

Required KB Items: MacOSX/Firefox/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 3/27/2025

Vulnerability Publication Date: 3/27/2025

Reference Information

CVE: CVE-2025-2857

IAVA: 2025-A-0204-S