Under certain circumstances, a user opt-in setting that Focus should require authentication before use could have been be bypassed. This vulnerability affects Firefox < 134.

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 f7d80111-116c-11f0-8b2c-b42e991fc52e advisory.

    security@mozilla.org reports:
    Under certain circumstances, a user opt-in setting that               Focus should require authentication before use could have               been be bypassed.

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 40 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-e8a71b6caf advisory.

    - Updated to latest upstream (134.0)

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 Fedora 41 host has a package installed that is affected by multiple vulnerabilities as referenced in the FEDORA-2025-6fcde64d77 advisory.

    - Updated to latest upstream (134.0)

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 134.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-01 advisory.

  - Memory safety bugs present in Firefox 133, Thunderbird 133, Firefox ESR 115.18, Firefox ESR 128.5,     Thunderbird 115.18, and Thunderbird 128.5. 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-2025-0242)

  - When redirecting to an invalid protocol scheme, an attacker could spoof the address bar.  Note: This issue     only affected Android operating systems. Other operating systems are unaffected. (CVE-2025-0244)

  - Under certain circumstances, a user opt-in setting that Focus should require authentication before use     could have been be bypassed. (CVE-2025-0245)

  - When using an invalid protocol scheme, an attacker could spoof the address bar.  Note: This issue only     affected Android operating systems. Other operating systems are unaffected. Note: This issue is a     different issue from CVE-2025-0244. (CVE-2025-0246)

  - The WebChannel API, which is used to transport various information across processes, did not check the     sending principal but rather accepted the principal being sent. This could have led to privilege     escalation attacks. (CVE-2025-0237)

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 134.0. It is, therefore, affected by multiple vulnerabilities as referenced in the mfsa2025-01 advisory.

  - Memory safety bugs present in Firefox 133, Thunderbird 133, Firefox ESR 115.18, Firefox ESR 128.5,     Thunderbird 115.18, and Thunderbird 128.5. 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-2025-0242)

  - When redirecting to an invalid protocol scheme, an attacker could spoof the address bar.  Note: This issue     only affected Android operating systems. Other operating systems are unaffected. (CVE-2025-0244)

  - Under certain circumstances, a user opt-in setting that Focus should require authentication before use     could have been be bypassed. (CVE-2025-0245)

  - When using an invalid protocol scheme, an attacker could spoof the address bar.  Note: This issue only     affected Android operating systems. Other operating systems are unaffected. Note: This issue is a     different issue from CVE-2025-0244. (CVE-2025-0246)

  - The WebChannel API, which is used to transport various information across processes, did not check the     sending principal but rather accepted the principal being sent. This could have led to privilege     escalation attacks. (CVE-2025-0237)

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
233895	FreeBSD : firefox -- authentication bypass (f7d80111-116c-11f0-8b2c-b42e991fc52e)	Nessus	FreeBSD Local Security Checks	low
213613	Fedora 40 : firefox (2025-e8a71b6caf)	Nessus	Fedora Local Security Checks	critical
213553	Fedora 41 : firefox (2025-6fcde64d77)	Nessus	Fedora Local Security Checks	critical
213528	Mozilla Firefox < 134.0	Nessus	Windows	critical
213527	Mozilla Firefox < 134.0	Nessus	MacOS X Local Security Checks	critical

Detections

Analytics

CVE-2025-0245

low

Tenable Plugins

low

critical

critical

critical

critical