FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports Collection

Mozilla -- XSS in sites without content-type header

Affected packages
	firefox	<	144.0.0,2
	firefox-esr	<	140.4.0
	thunderbird	<	144.0.0

Details

VuXML ID	4355ce42-ad06-11f0-b2aa-b42e991fc52e
Discovery	2025-10-14
Entry	2025-10-19

security@mozilla.org 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.

[source]

References

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