The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - The Firefox and Firefox Focus UI for the Android custom tab feature only showed the site that was     loaded, not the full hostname. User supplied content hosted on a subdomain of a site could have been used     to fool a user into thinking it was content from a different subdomain of that site. This vulnerability     was fixed in Firefox 144. (CVE-2025-11720)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote Fedora 43 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-2d70cfaa80 advisory.

    - Updated to latest upstream (114.0)

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

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

The version of Firefox installed on the remote Windows host is prior to 144.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-81 advisory.

  - Memory safety bug present in Firefox 143 and Thunderbird 143. This bug showed evidence of memory     corruption and we presume that with enough effort this could have been exploited to run arbitrary code.
    (CVE-2025-11721)

  - Use-after-free in MediaTrackGraphImpl::GetInstance() (CVE-2025-11708)

  - A compromised web process was able to trigger out of bounds reads and writes in a more privileged process     using manipulated WebGL textures. (CVE-2025-11709)

  - A compromised web process using malicious IPC messages could have caused the privileged browser process to     reveal blocks of its memory to the compromised process. (CVE-2025-11710)

  - There was a way to change the value of JavaScript Object properties that were supposed to be non-     writeable. (CVE-2025-11711)

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

The version of Firefox installed on the remote macOS or Mac OS X host is prior to 144.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-81 advisory.

  - Memory safety bug present in Firefox 143 and Thunderbird 143. This bug showed evidence of memory     corruption and we presume that with enough effort this could have been exploited to run arbitrary code.
    (CVE-2025-11721)

  - Use-after-free in MediaTrackGraphImpl::GetInstance() (CVE-2025-11708)

  - A compromised web process was able to trigger out of bounds reads and writes in a more privileged process     using manipulated WebGL textures. (CVE-2025-11709)

  - A compromised web process using malicious IPC messages could have caused the privileged browser process to     reveal blocks of its memory to the compromised process. (CVE-2025-11710)

  - There was a way to change the value of JavaScript Object properties that were supposed to be non-     writeable. (CVE-2025-11711)

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

The remote Fedora 42 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-64d57de006 advisory.

    - Added fix for mzbz#1990430 (crashes)

    ----

    - Updated to latest upstream (144.0)

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

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

ID	Name	Product	Family	Published	Updated	Severity
271516	Linux Distros Unpatched Vulnerability : CVE-2025-11720	Nessus	Misc.	10/27/2025	4/16/2026	high
272134	Fedora 43 : firefox (2025-2d70cfaa80)	Nessus	Fedora Local Security Checks	11/1/2025	11/1/2025	critical
270393	Mozilla Firefox < 144.0	Nessus	Windows	10/14/2025	11/18/2025	critical
270394	Mozilla Firefox < 144.0	Nessus	MacOS X Local Security Checks	10/14/2025	11/18/2025	critical
270734	Fedora 42 : firefox (2025-64d57de006)	Nessus	Fedora Local Security Checks	10/18/2025	11/18/2025	critical

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