When String.toUpperCase() caused a string to get longer it was possible for uninitialized memory to be incorporated into the result string This vulnerability affects Firefox < 136 and Thunderbird < 136.

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the 1a67144d-0d86-11f0-8542-b42e991fc52e advisory.

    security@mozilla.org reports:
    An inconsistent comparator in xslt/txNodeSorter could have resulted             in potentially exploitable out-of-bounds access.  Only affected             version 122 and later.  This vulnerability affects Firefox <             136, Firefox ESR < 128.8, Thunderbird < 136, and Thunderbird             < 128.8.
    Under certain circumstances, a user opt-in setting that Focus should             require authentication before use could have been be bypassed             (distinct from CVE-2025-0245).  This vulnerability affects Firefox             < 136.
    When String.toUpperCase() caused a string to get longer it was             possible for uninitialized memory to be incorporated into the result             string This vulnerability affects Firefox < 136 and Thunderbird             < 136.
    Websites redirecting to a non-HTTP scheme URL could allow a website             address to be spoofed for a malicious page This vulnerability affects             Firefox for iOS < 136.

Tenable has extracted the preceding description block directly from the FreeBSD 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 Fedora 40 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-100adaf12d advisory.

    - Updated to latest upstream (136.0)

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-7334-1 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-2025-1933, CVE-2025-1934,     CVE-2025-1935, CVE-2025-1936, CVE-2025-1937, CVE-2025-1942)

    It was discovered that Firefox did not properly handle WebTransport connection, leading to a use-after-     free vulnerability. An attacker could potentially exploit this issue to cause a denial of service.
    (CVE-2025-1931)

    Ivan Fratric discovered that Firefox did not properly handle XSLT sorting, leading to a out-of-bounds     access vulnerability. An attacker could potentially exploit this issue to cause a denial of service, or     execute arbitrary code. (CVE-2025-1932)

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 Fedora 41 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-60c0e24d76 advisory.

    - Updated to latest upstream (136.0)

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 Thunderbird installed on the remote Windows host is prior to 136.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-17 advisory.

  - Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 128.7, and Thunderbird 128.7. 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-2025-1938)

  - An inconsistent comparator in xslt/txNodeSorter could have resulted in potentially exploitable out-of-     bounds access. Only affected version 122 and later. (CVE-2025-1932)

  - Certain crafted MIME email messages that claimed to contain an encrypted OpenPGP message, which instead     contained an OpenPGP signed message, were wrongly shown as being encrypted. (CVE-2025-26696)

  - When requesting an OpenPGP key from a WKD server, an incorrect padding size was used and a network     observer could have learned the length of the requested email address. (CVE-2025-26695)

  - On Windows, a compromised content process could use bad StreamData sent over AudioIPC to trigger a use-     after-free in the Browser process. This could have led to a sandbox escape. (CVE-2025-1930)

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 136.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-17 advisory.

  - Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 128.7, and Thunderbird 128.7. 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-2025-1938)

  - An inconsistent comparator in xslt/txNodeSorter could have resulted in potentially exploitable out-of-     bounds access. Only affected version 122 and later. (CVE-2025-1932)

  - Certain crafted MIME email messages that claimed to contain an encrypted OpenPGP message, which instead     contained an OpenPGP signed message, were wrongly shown as being encrypted. (CVE-2025-26696)

  - When requesting an OpenPGP key from a WKD server, an incorrect padding size was used and a network     observer could have learned the length of the requested email address. (CVE-2025-26695)

  - On Windows, a compromised content process could use bad StreamData sent over AudioIPC to trigger a use-     after-free in the Browser process. This could have led to a sandbox escape. (CVE-2025-1930)

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 136.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-14 advisory.

  - Malicious pages could use Firefox for Android to pass FIDO: links to the OS and trigger the hybrid     passkey transport. An attacker within Bluetooth range could have used this to trick the user into using     their passkey to log the attacker's computer into the target account. (CVE-2024-9956)

  - On Windows, a compromised content process could use bad StreamData sent over AudioIPC to trigger a use-     after-free in the Browser process. This could have led to a sandbox escape. (CVE-2025-1930)

  - Android apps can load web pages using the Custom Tabs feature. This feature supports a transition     animation that could have been used to trick a user into granting sensitive permissions by hiding what the     user was actually clicking. (CVE-2025-1939)

  - It was possible to cause a use-after-free in the content process side of a WebTransport connection,     leading to a potentially exploitable crash. (CVE-2025-1931)

  - An inconsistent comparator in xslt/txNodeSorter could have resulted in potentially exploitable out-of-     bounds access. Only affected version 122 and later. (CVE-2025-1932)

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 136.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-14 advisory.

  - Malicious pages could use Firefox for Android to pass FIDO: links to the OS and trigger the hybrid     passkey transport. An attacker within Bluetooth range could have used this to trick the user into using     their passkey to log the attacker's computer into the target account. (CVE-2024-9956)

  - On Windows, a compromised content process could use bad StreamData sent over AudioIPC to trigger a use-     after-free in the Browser process. This could have led to a sandbox escape. (CVE-2025-1930)

  - Android apps can load web pages using the Custom Tabs feature. This feature supports a transition     animation that could have been used to trick a user into granting sensitive permissions by hiding what the     user was actually clicking. (CVE-2025-1939)

  - It was possible to cause a use-after-free in the content process side of a WebTransport connection,     leading to a potentially exploitable crash. (CVE-2025-1931)

  - An inconsistent comparator in xslt/txNodeSorter could have resulted in potentially exploitable out-of-     bounds access. Only affected version 122 and later. (CVE-2025-1932)

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
233786	FreeBSD : mozilla -- multiple vulnerabilities (1a67144d-0d86-11f0-8542-b42e991fc52e)	Nessus	FreeBSD Local Security Checks	critical
232329	Fedora 40 : firefox (2025-100adaf12d)	Nessus	Fedora Local Security Checks	high
232218	Ubuntu 20.04 LTS : Firefox vulnerabilities (USN-7334-1)	Nessus	Ubuntu Local Security Checks	critical
232205	Fedora 41 : firefox (2025-60c0e24d76)	Nessus	Fedora Local Security Checks	high
222958	Mozilla Thunderbird < 136.0	Nessus	Windows	critical
222957	Mozilla Thunderbird < 136.0	Nessus	MacOS X Local Security Checks	critical
221619	Mozilla Firefox < 136.0	Nessus	MacOS X Local Security Checks	high
221618	Mozilla Firefox < 136.0	Nessus	Windows	high

Detections

Analytics

CVE-2025-1942

critical

Tenable Plugins

critical

high

critical

high

critical

critical

high

high