The version of mozilla-firefox installed on the remote host is prior to 128.11.0esr. It is, therefore, affected by multiple vulnerabilities as referenced in the SSA:2025-147-01 advisory.

    New mozilla-firefox packages are available for Slackware 15.0 and -current to fix security issues.

Tenable has extracted the preceding description block directly from the mozilla-firefox 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.

  - Script elements loading cross-origin resources generated load and error events which leaked information     enabling XS-Leaks attacks. This vulnerability affects Firefox < 139, Firefox ESR < 128.11, Thunderbird <     139, and Thunderbird < 128.11. (CVE-2025-5266)

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

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4194 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4194-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/               Emilio Pozuelo Monfort     May 30, 2025                                  https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : thunderbird     Version        : 1:128.11.0esr-1~deb11u1     CVE ID         : CVE-2025-4918 CVE-2025-4919 CVE-2025-5263 CVE-2025-5264                      CVE-2025-5266 CVE-2025-5267 CVE-2025-5268 CVE-2025-5269                      CVE-2025-5283

    Multiple security issues were discovered in Thunderbird, which could     result in the execution of arbitrary code or information disclosure.

    For Debian 11 bullseye, these problems have been fixed in version     1:128.11.0esr-1~deb11u1.

    We recommend that you upgrade your thunderbird packages.

    For the detailed security status of thunderbird please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/thunderbird

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian 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 Redhat Enterprise Linux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2025:8599 advisory.

    Mozilla Thunderbird is a standalone mail and newsgroup client.

    Security Fix(es):

    * firefox: thunderbird: Out-of-bounds access when resolving Promise objects (CVE-2025-4918)

    * firefox: thunderbird: Out-of-bounds access when optimizing linear sums (CVE-2025-4919)

    * firefox: thunderbird: Clickjacking vulnerability could have led to leaking saved payment card details     (CVE-2025-5267)

    * firefox: thunderbird: Potential local code execution in ?Copy as cURL? command (CVE-2025-5264)

    * firefox: thunderbird: Memory safety bugs (CVE-2025-5268)

    * firefox: thunderbird: Script element events leaked cross-origin resource status (CVE-2025-5266)

    * firefox: thunderbird: Error handling for script execution was incorrectly isolated from web content     (CVE-2025-5263)

    * firefox: thunderbird: Memory safety bug (CVE-2025-5269)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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.

The remote Redhat Enterprise Linux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the RHSA-2025:8598 advisory.

    Mozilla Thunderbird is a standalone mail and newsgroup client.

    Security Fix(es):

    * firefox: thunderbird: Out-of-bounds access when resolving Promise objects (CVE-2025-4918)

    * firefox: thunderbird: Out-of-bounds access when optimizing linear sums (CVE-2025-4919)

    * firefox: thunderbird: Clickjacking vulnerability could have led to leaking saved payment card details     (CVE-2025-5267)

    * firefox: thunderbird: Potential local code execution in ?Copy as cURL? command (CVE-2025-5264)

    * firefox: thunderbird: Memory safety bugs (CVE-2025-5268)

    * firefox: thunderbird: Script element events leaked cross-origin resource status (CVE-2025-5266)

    * firefox: thunderbird: Error handling for script execution was incorrectly isolated from web content     (CVE-2025-5263)

    * firefox: thunderbird: Memory safety bug (CVE-2025-5269)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise 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.

The remote Oracle Linux 8 host has a package installed that is affected by multiple vulnerabilities as referenced in the ELSA-2025-8756 advisory.

    [128.11.0-1.0.1]
    - Fix prefs for new nss [Orabug: 37079820]
    - Add Oracle prefs file

    [128.11.0]
    - Add OpenELA debranding

    [128.11.0-1]
    - Update to 128.11.0

    [128.10.1-1]
    - Update to 128.10.1

Tenable has extracted the preceding description block directly from the Oracle 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.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2025-996 advisory.

    An attacker was able to perform an out-of-bounds read or write on a JavaScript `Promise` object. This     vulnerability affects Firefox < 138.0.4, Firefox ESR < 128.10.1, and Firefox ESR < 115.23.1.
    (CVE-2025-4918)

    An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array     index sizes. This vulnerability affects Firefox < 138.0.4, Firefox ESR < 128.10.1, and Firefox ESR <     115.23.1. (CVE-2025-4919)

    Error handling for script execution was incorrectly isolated from web content, which could have allowed     cross-origin leak attacks. This vulnerability affects Firefox < 139, Firefox ESR < 115.24, and Firefox ESR     < 128.11. (CVE-2025-5263)

    Due to insufficient escaping of the newline character in the Copy as cURL feature, an attacker could     trick a user into using this command, potentially leading to local code execution on the user's system.
    This vulnerability affects Firefox < 139, Firefox ESR < 115.24, and Firefox ESR < 128.11. (CVE-2025-5264)

    Due to insufficient escaping of the ampersand character in the Copy as cURL feature, an attacker could     trick a user into using this command, potentially leading to local code execution on the user's     system.*This bug only affects Firefox for Windows. Other versions of Firefox are unaffected.* This     vulnerability affects Firefox < 139, Firefox ESR < 115.24, and Firefox ESR < 128.11. (CVE-2025-5265)

    Script elements loading cross-origin resources generated load and error events which leaked information     enabling XS-Leaks attacks. This vulnerability affects Firefox < 139 and Firefox ESR < 128.11.
    (CVE-2025-5266)

    A clickjacking vulnerability could have been used to trick a user into leaking saved payment card details     to a malicious page. This vulnerability affects Firefox < 139 and Firefox ESR < 128.11. (CVE-2025-5267)

    Memory safety bugs present in Firefox 138, Thunderbird 138, Firefox ESR 128.10, and Thunderbird 128.10.
    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 < 139 and     Firefox ESR < 128.11. (CVE-2025-5268)

    Memory safety bug present in Firefox ESR 128.10, and Thunderbird 128.10. 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 ESR < 128.11. (CVE-2025-5269)

Tenable has extracted the preceding description block directly from the tested product 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 AlmaLinux 9 host has a package installed that is affected by multiple vulnerabilities as referenced in the ALSA-2025:8607 advisory.

    * firefox: thunderbird: Out-of-bounds access when resolving Promise objects (CVE-2025-4918)
      * firefox: thunderbird: Out-of-bounds access when optimizing linear sums (CVE-2025-4919)
      * firefox: thunderbird: Clickjacking vulnerability could have led to leaking saved payment card details     (CVE-2025-5267)
      * firefox: thunderbird: Potential local code execution in ?Copy as cURL? command (CVE-2025-5264)
      * firefox: thunderbird: Memory safety bugs (CVE-2025-5268)
      * firefox: thunderbird: Script element events leaked cross-origin resource status (CVE-2025-5266)
      * firefox: thunderbird: Error handling for script execution was incorrectly isolated from web content     (CVE-2025-5263)
      * firefox: thunderbird: Memory safety bug (CVE-2025-5269)

Tenable has extracted the preceding description block directly from the AlmaLinux 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 RockyLinux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RLSA-2025:8756 advisory.

    * thunderbird: JavaScript Execution via Spoofed PDF Attachment and file:/// Link (CVE-2025-3909)

    * thunderbird: Sender Spoofing via Malformed From Header in Thunderbird (CVE-2025-3875)

    * thunderbird: Unsolicited File Download, Disk Space Exhaustion, and Credential Leakage via mailbox:///     Links (CVE-2025-3877)

    * thunderbird: Tracking Links in Attachments Bypassed Remote Content Blocking (CVE-2025-3932)

    * firefox: thunderbird: Out-of-bounds access when resolving Promise objects (CVE-2025-4918)

    * firefox: thunderbird: Out-of-bounds access when optimizing linear sums (CVE-2025-4919)

    * firefox: thunderbird: Clickjacking vulnerability could have led to leaking saved payment card details     (CVE-2025-5267)

    * firefox: thunderbird: Potential local code execution in ?Copy as cURL? command (CVE-2025-5264)

    * firefox: thunderbird: Memory safety bugs (CVE-2025-5268)

    * firefox: thunderbird: Script element events leaked cross-origin resource status (CVE-2025-5266)

    * firefox: thunderbird: Error handling for script execution was incorrectly isolated from web content     (CVE-2025-5263)

    * firefox: thunderbird: Memory safety bug (CVE-2025-5269)

Tenable has extracted the preceding description block directly from the RockyLinux 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
237345	Slackware Linux 15.0 / current mozilla-firefox Multiple Vulnerabilities (SSA:2025-147-01)	Nessus	Slackware Local Security Checks	5/27/2025	5/27/2025	medium
245095	Linux Distros Unpatched Vulnerability : CVE-2025-5266	Nessus	Misc.	8/7/2025	9/10/2025	medium
237582	Debian dla-4194 : thunderbird - security update	Nessus	Debian Local Security Checks	5/30/2025	6/12/2025	high
237799	RHEL 9 : thunderbird (RHSA-2025:8599)	Nessus	Red Hat Local Security Checks	6/5/2025	8/15/2025	high
237804	RHEL 9 : thunderbird (RHSA-2025:8598)	Nessus	Red Hat Local Security Checks	6/5/2025	8/15/2025	high
238235	Oracle Linux 8 : thunderbird (ELSA-2025-8756)	Nessus	Oracle Linux Local Security Checks	6/11/2025	9/11/2025	high
238277	Amazon Linux 2023 : firefox (ALAS2023-2025-996)	Nessus	Amazon Linux Local Security Checks	6/12/2025	8/12/2025	high
241264	AlmaLinux 9 : thunderbird (ALSA-2025:8607)	Nessus	Alma Linux Local Security Checks	7/3/2025	7/3/2025	high
243133	RockyLinux 8 : thunderbird (RLSA-2025:8756)	Nessus	Rocky Linux Local Security Checks	7/30/2025	9/24/2025	critical

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