High severity7.4NVD Advisory· Published Feb 26, 2021· Updated Jun 17, 2026
CVE-2021-23961
CVE-2021-23961
Description
Further techniques that built on the slipstream research combined with a malicious webpage could have exposed both an internal network's hosts as well as services running on the user's local machine. This vulnerability affects Firefox < 85.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
39<85+ 1 more
- (no CPE)range: <85
- (no CPE)range: < 85
- osv-coords35 versionspkg:rpm/opensuse/firefox-esr&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Leap%2015.2pkg:rpm/opensuse/MozillaFirefox&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Leap%2015.2pkg:rpm/opensuse/MozillaThunderbird&distro=openSUSE%20Tumbleweedpkg:rpm/suse/MozillaFirefox&distro=HPE%20Helion%20OpenStack%208pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Enterprise%20Storage%206pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Desktop%20Applications%2015%20SP2pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2011%20SP4-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCLpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCLpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCLpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSSpkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP3pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Linux%20Enterprise%20Software%20Development%20Kit%2012%20SP5pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Manager%20Proxy%204.0pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Manager%20Retail%20Branch%20Server%204.0pkg:rpm/suse/MozillaFirefox&distro=SUSE%20Manager%20Server%204.0pkg:rpm/suse/MozillaFirefox&distro=SUSE%20OpenStack%20Cloud%208pkg:rpm/suse/MozillaFirefox&distro=SUSE%20OpenStack%20Cloud%209pkg:rpm/suse/MozillaFirefox&distro=SUSE%20OpenStack%20Cloud%20Crowbar%208pkg:rpm/suse/MozillaFirefox&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209pkg:rpm/suse/MozillaThunderbird&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP2
< 128.5.1-1.1+ 34 more
- (no CPE)range: < 128.5.1-1.1
- (no CPE)range: < 78.10.0-lp152.2.55.1
- (no CPE)range: < 92.0-1.2
- (no CPE)range: < 78.10.0-lp152.2.41.1
- (no CPE)range: < 91.1.1-1.1
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-8.38.1
- (no CPE)range: < 78.10.0-78.126.1
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-3.139.1
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-112.57.2
- (no CPE)range: < 78.10.0-8.23.1
Patches
Vulnerability mechanics
References
8- bugzilla.mozilla.org/show_bug.cginvdIssue TrackingPermissions RequiredVendor Advisory
- lists.debian.org/debian-lts-announce/2021/04/msg00019.htmlnvdMailing ListThird Party Advisory
- lists.debian.org/debian-lts-announce/2021/04/msg00020.htmlnvdMailing ListThird Party Advisory
- security.gentoo.org/glsa/202104-09nvdThird Party Advisory
- security.gentoo.org/glsa/202104-10nvdThird Party Advisory
- www.debian.org/security/2021/dsa-4895nvdThird Party Advisory
- www.debian.org/security/2021/dsa-4897nvdThird Party Advisory
- www.mozilla.org/security/advisories/mfsa2021-03/nvdRelease NotesVendor Advisory
News mentions
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