Bug 2403770 (CVE-2025-11712)

Summary: CVE-2025-11712 thunderbird: firefox: An OBJECT tag type attribute overrode browser behavior on web resources without a content-type
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: gotiwari, jgrulich, jhorak, mvyas, tpopela
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in Thunderbird and Firefox. The Mozilla Foundation's Security Advisory describes the following issue: 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.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2025-10-14 13:02:26 UTC
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. This vulnerability affects Firefox < 144, Firefox ESR < 140.4, Thunderbird < 144, and Thunderbird < 140.4.

Comment 1 errata-xmlrpc 2025-10-15 15:54:34 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2025:18154 https://access.redhat.com/errata/RHSA-2025:18154

Comment 2 errata-xmlrpc 2025-10-15 16:35:36 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2025:18155 https://access.redhat.com/errata/RHSA-2025:18155

Comment 3 errata-xmlrpc 2025-10-20 02:20:22 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2025:18285 https://access.redhat.com/errata/RHSA-2025:18285

Comment 4 errata-xmlrpc 2025-10-20 17:49:46 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2025:18320 https://access.redhat.com/errata/RHSA-2025:18320

Comment 5 errata-xmlrpc 2025-10-20 17:52:58 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2025:18321 https://access.redhat.com/errata/RHSA-2025:18321

Comment 6 errata-xmlrpc 2025-10-22 19:49:49 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2025:18983 https://access.redhat.com/errata/RHSA-2025:18983