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

  - Memory safety bugs present in Firefox 118. Some of these bugs showed evidence of memory corruption and we     presume that with enough effort some of these could have been exploited to run arbitrary code. This     vulnerability affects Firefox < 119. (CVE-2023-5731)

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

The version of Firefox installed on the remote Windows host is prior to 119.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2023-45 advisory.

  - It was possible for certain browser prompts and dialogs to be activated or dismissed unintentionally by     the user due to an insufficient activation-delay. (CVE-2023-5721)

  - Using iterative requests an attacker was able to learn the size of an opaque response, as well as the     contents of a server-supplied Vary header. (CVE-2023-5722)

  - An attacker with temporary script access to a site could have set a cookie containing invalid characters     using <code>document.cookie</code> that could have led to unknown errors. (CVE-2023-5723)

  - Drivers are not always robust to extremely large draw calls and in some cases this scenario could have led     to a crash. (CVE-2023-5724)

  - A malicious installed WebExtension could open arbitrary URLs, which under the right circumstance could be     leveraged to collect sensitive user data. (CVE-2023-5725)

  - A website could have obscured the full screen notification by using the file open dialog. This could have     led to user confusion and possible spoofing attacks.  Note: This issue only affected macOS operating     systems. Other operating systems are unaffected. (CVE-2023-5726)

  - The executable file warning was not presented when downloading .msix, .msixbundle, .appx, and .appxbundle     files, which can run commands on a user's computer.   Note: This issue only affected Windows operating     systems. Other operating systems are unaffected. (CVE-2023-5727)

  - During garbage collection extra operations were performed on a object that should not be. This could have     led to a potentially exploitable crash. (CVE-2023-5728)

  - A malicious web site can enter fullscreen mode while simultaneously triggering a WebAuthn prompt. This     could have obscured the fullscreen notification and could have been leveraged in a spoofing attack.
    (CVE-2023-5729)

  - Memory safety bugs present in Firefox 118, Firefox ESR 115.3, and Thunderbird 115.3. Some of these bugs     showed evidence of memory corruption and we presume that with enough effort some of these could have been     exploited to run arbitrary code. (CVE-2023-5730)

  - Memory safety bugs present in Firefox 118. Some of these bugs showed evidence of memory corruption and we     presume that with enough effort some of these could have been exploited to run arbitrary code.
    (CVE-2023-5731)

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 38 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-7cdf31bb36 advisory.

    - Update to latest upstream (119.0)

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 119.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2023-45 advisory.

  - It was possible for certain browser prompts and dialogs to be activated or dismissed unintentionally by     the user due to an insufficient activation-delay. (CVE-2023-5721)

  - Using iterative requests an attacker was able to learn the size of an opaque response, as well as the     contents of a server-supplied Vary header. (CVE-2023-5722)

  - An attacker with temporary script access to a site could have set a cookie containing invalid characters     using <code>document.cookie</code> that could have led to unknown errors. (CVE-2023-5723)

  - Drivers are not always robust to extremely large draw calls and in some cases this scenario could have led     to a crash. (CVE-2023-5724)

  - A malicious installed WebExtension could open arbitrary URLs, which under the right circumstance could be     leveraged to collect sensitive user data. (CVE-2023-5725)

  - A website could have obscured the full screen notification by using the file open dialog. This could have     led to user confusion and possible spoofing attacks.  Note: This issue only affected macOS operating     systems. Other operating systems are unaffected. (CVE-2023-5726)

  - The executable file warning was not presented when downloading .msix, .msixbundle, .appx, and .appxbundle     files, which can run commands on a user's computer.   Note: This issue only affected Windows operating     systems. Other operating systems are unaffected. (CVE-2023-5727)

  - During garbage collection extra operations were performed on a object that should not be. This could have     led to a potentially exploitable crash. (CVE-2023-5728)

  - A malicious web site can enter fullscreen mode while simultaneously triggering a WebAuthn prompt. This     could have obscured the fullscreen notification and could have been leveraged in a spoofing attack.
    (CVE-2023-5729)

  - Memory safety bugs present in Firefox 118, Firefox ESR 115.3, and Thunderbird 115.3. Some of these bugs     showed evidence of memory corruption and we presume that with enough effort some of these could have been     exploited to run arbitrary code. (CVE-2023-5730)

  - Memory safety bugs present in Firefox 118. Some of these bugs showed evidence of memory corruption and we     presume that with enough effort some of these could have been exploited to run arbitrary code.
    (CVE-2023-5731)

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 37 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2023-4e191bea36 advisory.

    - Update to latest upstream (119.0)

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 remote Ubuntu 20.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-6456-1 advisory.

    Multiple security issues were discovered in Firefox. If a user were tricked into opening a specially     crafted website, an attacker could potentially exploit these to cause a denial of service, obtain     sensitive information across domains, or execute arbitrary code. (CVE-2023-5722, CVE-2023-5724,     CVE-2023-5728, CVE-2023-5729, CVE-2023-5730, CVE-2023-5731)

    Kelsey Gilbert discovered that Firefox did not properly manage certain browser prompts and dialogs due to     an insufficient activation-delay. An attacker could potentially exploit this issue to perform     clickjacking. (CVE-2023-5721)

    Daniel Veditz discovered that Firefox did not properly validate a cookie containing invalid characters. An     attacker could potentially exploit this issue to cause a denial of service. (CVE-2023-5723)

    Shaheen Fazim discovered that Firefox did not properly validate the URLs open by installed WebExtension.
    An attacker could potentially exploit this issue to obtain sensitive information. (CVE-2023-5725)

Tenable has extracted the preceding description block directly from the Ubuntu 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 remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 / openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:4214-1 advisory.

  - It was possible for certain browser prompts and dialogs to be activated or dismissed unintentionally by     the user due to an insufficient activation-delay. This vulnerability affects Firefox < 119, Firefox ESR <     115.4, and Thunderbird < 115.4.1. (CVE-2023-5721)

  - Using iterative requests an attacker was able to learn the size of an opaque response, as well as the     contents of a server-supplied Vary header. This vulnerability affects Firefox < 119. (CVE-2023-5722)

  - An attacker with temporary script access to a site could have set a cookie containing invalid characters     using `document.cookie` that could have led to unknown errors. This vulnerability affects Firefox < 119.
    (CVE-2023-5723)

  - Drivers are not always robust to extremely large draw calls and in some cases this scenario could have led     to a crash. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1.
    (CVE-2023-5724)

  - A malicious installed WebExtension could open arbitrary URLs, which under the right circumstance could be     leveraged to collect sensitive user data. This vulnerability affects Firefox < 119, Firefox ESR < 115.4,     and Thunderbird < 115.4.1. (CVE-2023-5725)

  - A website could have obscured the full screen notification by using the file open dialog. This could have     led to user confusion and possible spoofing attacks. *Note: This issue only affected macOS operating     systems. Other operating systems are unaffected.* This vulnerability affects Firefox < 119, Firefox ESR <     115.4, and Thunderbird < 115.4.1. (CVE-2023-5726)

  - The executable file warning was not presented when downloading .msix, .msixbundle, .appx, and .appxbundle     files, which can run commands on a user's computer. *Note: This issue only affected Windows operating     systems. Other operating systems are unaffected.* This vulnerability affects Firefox < 119, Firefox ESR <     115.4, and Thunderbird < 115.4.1. (CVE-2023-5727)

  - During garbage collection extra operations were performed on a object that should not be. This could have     led to a potentially exploitable crash. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and     Thunderbird < 115.4.1. (CVE-2023-5728)

  - A malicious web site can enter fullscreen mode while simultaneously triggering a WebAuthn prompt. This     could have obscured the fullscreen notification and could have been leveraged in a spoofing attack. This     vulnerability affects Firefox < 119. (CVE-2023-5729)

  - Memory safety bugs present in Firefox 118, Firefox ESR 115.3, and Thunderbird 115.3. Some of these bugs     showed evidence of memory corruption and we presume that with enough effort some of these could have been     exploited to run arbitrary code. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and     Thunderbird < 115.4.1. (CVE-2023-5730)

  - Memory safety bugs present in Firefox 118. Some of these bugs showed evidence of memory corruption and we     presume that with enough effort some of these could have been exploited to run arbitrary code. This     vulnerability affects Firefox < 119. (CVE-2023-5731)

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

The remote SUSE Linux SLES12 / SLES_SAP12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:4212-1 advisory.

  - It was possible for certain browser prompts and dialogs to be activated or dismissed unintentionally by     the user due to an insufficient activation-delay. This vulnerability affects Firefox < 119, Firefox ESR <     115.4, and Thunderbird < 115.4.1. (CVE-2023-5721)

  - Using iterative requests an attacker was able to learn the size of an opaque response, as well as the     contents of a server-supplied Vary header. This vulnerability affects Firefox < 119. (CVE-2023-5722)

  - An attacker with temporary script access to a site could have set a cookie containing invalid characters     using `document.cookie` that could have led to unknown errors. This vulnerability affects Firefox < 119.
    (CVE-2023-5723)

  - Drivers are not always robust to extremely large draw calls and in some cases this scenario could have led     to a crash. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1.
    (CVE-2023-5724)

  - A malicious installed WebExtension could open arbitrary URLs, which under the right circumstance could be     leveraged to collect sensitive user data. This vulnerability affects Firefox < 119, Firefox ESR < 115.4,     and Thunderbird < 115.4.1. (CVE-2023-5725)

  - A website could have obscured the full screen notification by using the file open dialog. This could have     led to user confusion and possible spoofing attacks. *Note: This issue only affected macOS operating     systems. Other operating systems are unaffected.* This vulnerability affects Firefox < 119, Firefox ESR <     115.4, and Thunderbird < 115.4.1. (CVE-2023-5726)

  - The executable file warning was not presented when downloading .msix, .msixbundle, .appx, and .appxbundle     files, which can run commands on a user's computer. *Note: This issue only affected Windows operating     systems. Other operating systems are unaffected.* This vulnerability affects Firefox < 119, Firefox ESR <     115.4, and Thunderbird < 115.4.1. (CVE-2023-5727)

  - During garbage collection extra operations were performed on a object that should not be. This could have     led to a potentially exploitable crash. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and     Thunderbird < 115.4.1. (CVE-2023-5728)

  - A malicious web site can enter fullscreen mode while simultaneously triggering a WebAuthn prompt. This     could have obscured the fullscreen notification and could have been leveraged in a spoofing attack. This     vulnerability affects Firefox < 119. (CVE-2023-5729)

  - Memory safety bugs present in Firefox 118, Firefox ESR 115.3, and Thunderbird 115.3. Some of these bugs     showed evidence of memory corruption and we presume that with enough effort some of these could have been     exploited to run arbitrary code. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and     Thunderbird < 115.4.1. (CVE-2023-5730)

  - Memory safety bugs present in Firefox 118. Some of these bugs showed evidence of memory corruption and we     presume that with enough effort some of these could have been exploited to run arbitrary code. This     vulnerability affects Firefox < 119. (CVE-2023-5731)

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

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2023:4213-1 advisory.

  - It was possible for certain browser prompts and dialogs to be activated or dismissed unintentionally by     the user due to an insufficient activation-delay. This vulnerability affects Firefox < 119, Firefox ESR <     115.4, and Thunderbird < 115.4.1. (CVE-2023-5721)

  - Using iterative requests an attacker was able to learn the size of an opaque response, as well as the     contents of a server-supplied Vary header. This vulnerability affects Firefox < 119. (CVE-2023-5722)

  - An attacker with temporary script access to a site could have set a cookie containing invalid characters     using `document.cookie` that could have led to unknown errors. This vulnerability affects Firefox < 119.
    (CVE-2023-5723)

  - Drivers are not always robust to extremely large draw calls and in some cases this scenario could have led     to a crash. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and Thunderbird < 115.4.1.
    (CVE-2023-5724)

  - A malicious installed WebExtension could open arbitrary URLs, which under the right circumstance could be     leveraged to collect sensitive user data. This vulnerability affects Firefox < 119, Firefox ESR < 115.4,     and Thunderbird < 115.4.1. (CVE-2023-5725)

  - A website could have obscured the full screen notification by using the file open dialog. This could have     led to user confusion and possible spoofing attacks. *Note: This issue only affected macOS operating     systems. Other operating systems are unaffected.* This vulnerability affects Firefox < 119, Firefox ESR <     115.4, and Thunderbird < 115.4.1. (CVE-2023-5726)

  - The executable file warning was not presented when downloading .msix, .msixbundle, .appx, and .appxbundle     files, which can run commands on a user's computer. *Note: This issue only affected Windows operating     systems. Other operating systems are unaffected.* This vulnerability affects Firefox < 119, Firefox ESR <     115.4, and Thunderbird < 115.4.1. (CVE-2023-5727)

  - During garbage collection extra operations were performed on a object that should not be. This could have     led to a potentially exploitable crash. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and     Thunderbird < 115.4.1. (CVE-2023-5728)

  - A malicious web site can enter fullscreen mode while simultaneously triggering a WebAuthn prompt. This     could have obscured the fullscreen notification and could have been leveraged in a spoofing attack. This     vulnerability affects Firefox < 119. (CVE-2023-5729)

  - Memory safety bugs present in Firefox 118, Firefox ESR 115.3, and Thunderbird 115.3. Some of these bugs     showed evidence of memory corruption and we presume that with enough effort some of these could have been     exploited to run arbitrary code. This vulnerability affects Firefox < 119, Firefox ESR < 115.4, and     Thunderbird < 115.4.1. (CVE-2023-5730)

  - Memory safety bugs present in Firefox 118. Some of these bugs showed evidence of memory corruption and we     presume that with enough effort some of these could have been exploited to run arbitrary code. This     vulnerability affects Firefox < 119. (CVE-2023-5731)

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

The remote host is affected by the vulnerability described in GLSA-202401-10 (Mozilla Firefox: Multiple Vulnerabilities)

    Multiple vulnerabilities have been discovered in Mozilla Firefox. Please review the CVE identifiers     referenced below for details.

Tenable has extracted the preceding description block directly from the Gentoo Linux 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
245453	Linux Distros Unpatched Vulnerability : CVE-2023-5731	Nessus	Misc.	8/7/2025	8/7/2025	critical
183785	Mozilla Firefox < 119.0	Nessus	Windows	10/24/2023	12/1/2023	critical
183904	Fedora 38 : firefox (2023-7cdf31bb36)	Nessus	Fedora Local Security Checks	10/26/2023	11/14/2024	critical
183786	Mozilla Firefox < 119.0	Nessus	MacOS X Local Security Checks	10/24/2023	12/1/2023	critical
183930	Fedora 37 : firefox (2023-4e191bea36)	Nessus	Fedora Local Security Checks	10/26/2023	11/14/2024	critical
184009	Ubuntu 20.04 LTS : Firefox vulnerabilities (USN-6456-1)	Nessus	Ubuntu Local Security Checks	10/30/2023	8/27/2024	critical
183949	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : MozillaFirefox (SUSE-SU-2023:4214-1)	Nessus	SuSE Local Security Checks	10/27/2023	11/2/2023	critical
183950	SUSE SLES12 Security Update : MozillaFirefox (SUSE-SU-2023:4212-1)	Nessus	SuSE Local Security Checks	10/27/2023	11/2/2023	critical
183951	SUSE SLES15 Security Update : MozillaFirefox (SUSE-SU-2023:4213-1)	Nessus	SuSE Local Security Checks	10/27/2023	11/2/2023	critical
187727	GLSA-202401-10 : Mozilla Firefox: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	1/9/2024	9/25/2025	critical

Detections

Analytics

Plugins Search

critical

critical

critical

critical

critical

critical

critical

critical

critical

critical