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. This vulnerability affects Firefox < 144 and Thunderbird < 144.

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

  - 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.
    This vulnerability affects Firefox < 144 and Thunderbird < 144. (CVE-2025-11721)

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

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the ed132d42-ab81-11f0-b961-b42e991fc52e advisory.

    security@mozilla.org reports:
    Memory safety bug. This bug showed evidence of memory               corruption and we presume that with enough effort this could               have been exploited to run arbitrary code.

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

Note that Nessus has not tested for this issue 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.

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 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 Thunderbird 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 mfsa2025-84 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 Thunderbird installed on the remote Windows host is prior to 144.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-84 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.

ID	Name	Product	Family	Severity
272134	Fedora 43 : firefox (2025-2d70cfaa80)	Nessus	Fedora Local Security Checks	critical
271513	Linux Distros Unpatched Vulnerability : CVE-2025-11721	Nessus	Misc.	critical
270744	FreeBSD : Mozilla -- Memory safety bugs (ed132d42-ab81-11f0-b961-b42e991fc52e)	Nessus	FreeBSD Local Security Checks	critical
270734	Fedora 42 : firefox (2025-64d57de006)	Nessus	Fedora Local Security Checks	critical
270394	Mozilla Firefox < 144.0	Nessus	MacOS X Local Security Checks	critical
270393	Mozilla Firefox < 144.0	Nessus	Windows	critical
270355	Mozilla Thunderbird < 144.0	Nessus	MacOS X Local Security Checks	critical
270354	Mozilla Thunderbird < 144.0	Nessus	Windows	critical

Detections

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CVE-2025-11721

critical

Tenable Plugins

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critical

critical

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critical