Medium severity6.1NVD Advisory· Published Oct 14, 2025· Updated Apr 13, 2026
CVE-2025-11712
CVE-2025-11712
Description
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 was fixed in Firefox 144, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
38cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*+ 3 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*range: <144.0
- cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*range: <140.4.0
- (no CPE)range: <140.4
- (no CPE)range: <144
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*range: <140.4.0
- (no CPE)range: <144
- osv-coords32 versionspkg:rpm/almalinux/firefoxpkg:rpm/almalinux/firefox-x11pkg:rpm/almalinux/thunderbirdpkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweedpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Enterprise%20Storage%207.1pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP3-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-ESPOSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP4-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-ESPOSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP5-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP6pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP7pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP3-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP4-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP5-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP3pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP4pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP5pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20LTSS%20Extended%20Security%2012%20SP5pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Package%20Hub%2015%20SP6pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Package%20Hub%2015%20SP7pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP6pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP7
< 140.4.0-3.el10_0+ 31 more
- (no CPE)range: < 140.4.0-3.el10_0
- (no CPE)range: < 140.4.0-3.el9_6.alma.1
- (no CPE)range: < 140.4.0-2.el10_0.alma.1
- (no CPE)range: < 140.4.0-1.1
- (no CPE)range: < 140.4.0-150200.152.207.1
- (no CPE)range: < 140.5.0-160000.1.1
- (no CPE)range: < 144.0-1.1
- (no CPE)range: < 140.4.0-150200.8.242.1
- (no CPE)range: < 140.4.0-bp160.1.1
- (no CPE)range: < 140.4.0-1.1
- (no CPE)range: < 140.4.0-150200.152.207.1
- (no CPE)range: < 140.4.0-150200.152.207.1
- (no CPE)range: < 140.4.0-150200.152.207.1
- (no CPE)range: < 140.4.0-150200.152.207.1
- (no CPE)range: < 140.4.0-150200.152.207.1
- (no CPE)range: < 140.4.0-150200.152.207.1
- (no CPE)range: < 140.4.0-150200.152.207.1
- (no CPE)range: < 140.4.0-150200.152.207.1
- (no CPE)range: < 140.4.0-112.286.1
- (no CPE)range: < 140.4.0-150200.152.207.1
- (no CPE)range: < 140.4.0-150200.152.207.1
- (no CPE)range: < 140.4.0-150200.152.207.1
- (no CPE)range: < 140.5.0-160000.1.1
- (no CPE)range: < 140.4.0-150200.152.207.1
- (no CPE)range: < 140.4.0-150200.152.207.1
- (no CPE)range: < 140.4.0-150200.152.207.1
- (no CPE)range: < 140.5.0-160000.1.1
- (no CPE)range: < 140.4.0-112.286.1
- (no CPE)range: < 140.4.0-150200.8.242.1
- (no CPE)range: < 140.4.0-150200.8.242.1
- (no CPE)range: < 140.4.0-150200.8.242.1
- (no CPE)range: < 140.4.0-150200.8.242.1
Patches
Vulnerability mechanics
References
7- www.mozilla.org/security/advisories/mfsa2025-81/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2025-83/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2025-84/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2025-85/nvdVendor Advisory
- bugzilla.mozilla.org/show_bug.cginvdIssue TrackingPermissions Required
- lists.debian.org/debian-lts-announce/2025/10/msg00015.htmlnvd
- lists.debian.org/debian-lts-announce/2025/10/msg00031.htmlnvd
News mentions
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