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FreeBSD : Mozilla -- XSS in sites without content-type header (4355ce42-ad06-11f0-b2aa-b42e991fc52e)

medium Nessus Plugin ID 270777

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Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

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 4355ce42-ad06-11f0-b2aa-b42e991fc52e advisory.

 [email protected] reports:
 A malicious page could have used the type attribute of an OBJECT tag to override the default browser behavior when encountering a web resource served without a content-type. This could have contributed to an XSS on a site that unsafely serves files without a content-type header.

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.

Solution

Update the affected packages.

See Also

https://nvd.nist.gov/vuln/detail/CVE-2025-11712

http://www.nessus.org/u?dff2c462

Plugin Details

Severity: Medium

ID: 270777

File Name: freebsd_pkg_4355ce42ad0611f0b2aab42e991fc52e.nasl

Version: 1.2

Type: local

Published: 10/20/2025

Updated: 11/18/2025

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.8

CVSS v2

Risk Factor: Medium

Base Score: 6.4

Temporal Score: 4.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

CVSS Score Source: CVE-2025-11712

CVSS v3

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 5.3

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:thunderbird, cpe:/o:freebsd:freebsd, p-cpe:/a:freebsd:freebsd:firefox, p-cpe:/a:freebsd:freebsd:firefox-esr

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 10/19/2025

Vulnerability Publication Date: 10/14/2025

Reference Information

CVE: CVE-2025-11712

IAVA: 2025-A-0743, 2025-A-0744-S