The version of firefox installed on the remote host is prior to 128.12.0-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2FIREFOX-2025-040 advisory.

    A use-after-free in FontFaceSet resulted in a potentially exploitable crash. This vulnerability affects     Firefox < 140, Firefox ESR < 115.25, and Firefox ESR < 128.12. (CVE-2025-6424)

    An attacker who enumerated resources from the WebCompat extension could have obtained a persistent UUID     that identified the browser, and persisted between containers and normal/private browsing mode, but not     profiles. This vulnerability affects Firefox < 140, Firefox ESR < 115.25, and Firefox ESR < 128.12.
    (CVE-2025-6425)

    Firefox could have incorrectly parsed a URL and rewritten it to the youtube.com domain when parsing the     URL specified in an `embed` tag.  This could have bypassed website security checks that restricted which     domains users were allowed to embed. This vulnerability affects Firefox < 140 and Firefox ESR < 128.12.
    (CVE-2025-6429)

    When a file download is specified via the Content-Disposition header, that directive would be ignored if     the file was included via a <embed> or <object> tag, potentially making a website vulnerable to a cross-     site scripting attack. (CVE-2025-6430)

Tenable has extracted the preceding description block directly from the tested product security advisory.

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

Detections

Analytics

Amazon Linux 2 : firefox (ALASFIREFOX-2025-040)

critical Nessus Plugin ID 241734

Version 1.2

Version 1.1

Version 1.2 Jul 15, 2025, 2:39 AM CVSS metrics ("Cvssv4 score" set to 0.0) CVSSv2 severity (based on None, severity decreased from "High" to "Low") Plugin metadata Plugin Feed: 202507150239
Version 1.1 Jul 11, 2025, 4:37 AM New Plugin Feed: 202507110437