# CVE-2020-6798: Firefox ESR: If a template tag was used in a select tag, the parser could be confused and allow JavaScript parsing… CVE-2020-6798 is fixed in 10 products on 2 platforms, first by firefox 73.0+build3-0ubuntu0.18.04.1, released February 10, 2020. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2020-6798 - Priority: Routine - CVSS: 6.1 (Important) - EPSS: 0.0205 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Feb 10, 2020 - Vendor advisory: https://nvd.nist.gov/vuln/detail/CVE-2020-6798 ## Description If a template tag was used in a select tag, the parser could be confused and allow JavaScript parsing and execution when it should not be allowed. A site that relied on the browser behaving correctly could suffer a cross-site scripting vulnerability as a result. In general, this flaw cannot be exploited through email in the Thunderbird product because scripting is disabled when reading mail, but is potentially a risk in browser or browser-like contexts. This vulnerability affects Thunderbird < 68.5, Firefox < 73, and Firefox < ESR68.5. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Windows apps | Mozilla Firefox ESR (en-US) | 78.0esr | [Mozilla Firefox ESR (en-US) 78.0esr](https://patchblox.com/security/data/fix/windows-app/mozilla.firefox.esr-78.0esr.md) | Jun 25, 2020 | | Linux | firefox RHEL 8 | 0:68.5.0-2.el8_1 | [RHSA-2020:0512](https://patchblox.com/security/data/fix/linux/rhsa-2020-0512.md) | Feb 17, 2020 | | Linux | firefox Ubuntu 18.04.6 LTS (bionic) | 73.0+build3-0ubuntu0.18.04.1 | [firefox 73.0+build3-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-73.0-build3-0ubuntu0.18.04.1.md) | Feb 10, 2020 | | Linux | firefox Ubuntu 20.04 LTS (focal) | 73.0+build3-0ubuntu1 | [firefox 73.0+build3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-73.0-build3-0ubuntu1.md) | Feb 10, 2020 | | Linux | firefox ol 8 | 0:68.5.0-2.0.1.el8_1 | [ELSA-2020-0512](https://patchblox.com/security/data/fix/linux/elsa-2020-0512.md) | Feb 19, 2020 | | Linux | firefox-geckodriver Ubuntu 18.04.6 LTS (bionic) | 73.0+build3-0ubuntu0.18.04.1 | [firefox-geckodriver 73.0+build3-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-geckodriver-73.0-build3-0ubuntu0.18.04.1.md) | Feb 10, 2020 | | Linux | firefox-geckodriver Ubuntu 20.04 LTS (focal) | 73.0+build3-0ubuntu1 | [firefox-geckodriver 73.0+build3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-geckodriver-73.0-build3-0ubuntu1.md) | Feb 10, 2020 | | Linux | firefox-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 73.0+build3-0ubuntu0.18.04.1 | [firefox-mozsymbols 73.0+build3-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-firefox-mozsymbols-73.0-build3-0ubuntu0.18.04.1.md) | Feb 10, 2020 | | Linux | firefox-mozsymbols Ubuntu 20.04 LTS (focal) | 73.0+build3-0ubuntu1 | [firefox-mozsymbols 73.0+build3-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-firefox-mozsymbols-73.0-build3-0ubuntu1.md) | Feb 10, 2020 | | Linux | thunderbird RHEL 8 | 0:68.5.0-1.el8_1 | [RHSA-2020:0577](https://patchblox.com/security/data/fix/linux/rhsa-2020-0577.md) | Feb 24, 2020 | | Linux | thunderbird Ubuntu 18.04.6 LTS (bionic) | 1:68.7.0+build1-0ubuntu0.18.04.1 | [thunderbird 1:68.7.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-1-68.7.0-build1-0ubuntu0.18.04.1.md) | Apr 6, 2020 | | Linux | thunderbird Ubuntu 20.04 LTS (focal) | 1:68.5.0+build1-0ubuntu1 | [thunderbird 1:68.5.0+build1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-1-68.5.0-build1-0ubuntu1.md) | Feb 10, 2020 | | Linux | thunderbird ol 8 | 0:68.5.0-1.0.1.el8_1 | [ELSA-2020-0577](https://patchblox.com/security/data/fix/linux/elsa-2020-0577.md) | Feb 26, 2020 | | Linux | thunderbird-gnome-support Ubuntu 18.04.6 LTS (bionic) | 1:68.7.0+build1-0ubuntu0.18.04.1 | [thunderbird-gnome-support 1:68.7.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-gnome-support-1-68.7.0-build1-0ubuntu0.18.04.1.md) | Apr 6, 2020 | | Linux | thunderbird-gnome-support Ubuntu 20.04 LTS (focal) | 1:68.5.0+build1-0ubuntu1 | [thunderbird-gnome-support 1:68.5.0+build1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-gnome-support-1-68.5.0-build1-0ubuntu1.md) | Feb 10, 2020 | | Linux | thunderbird-mozsymbols Ubuntu 18.04.6 LTS (bionic) | 1:68.7.0+build1-0ubuntu0.18.04.1 | [thunderbird-mozsymbols 1:68.7.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-thunderbird-mozsymbols-1-68.7.0-build1-0ubuntu0.18.04.1.md) | Apr 6, 2020 | | Linux | thunderbird-mozsymbols Ubuntu 20.04 LTS (focal) | 1:68.5.0+build1-0ubuntu1 | [thunderbird-mozsymbols 1:68.5.0+build1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-thunderbird-mozsymbols-1-68.5.0-build1-0ubuntu1.md) | Feb 10, 2020 | | Linux | xul-ext-calendar-timezones Ubuntu 18.04.6 LTS (bionic) | 1:68.7.0+build1-0ubuntu0.18.04.1 | [xul-ext-calendar-timezones 1:68.7.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-calendar-timezones-1-68.7.0-build1-0ubuntu0.18.04.1.md) | Apr 6, 2020 | | Linux | xul-ext-calendar-timezones Ubuntu 20.04 LTS (focal) | 1:68.5.0+build1-0ubuntu1 | [xul-ext-calendar-timezones 1:68.5.0+build1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-calendar-timezones-1-68.5.0-build1-0ubuntu1.md) | Feb 10, 2020 | | Linux | xul-ext-gdata-provider Ubuntu 18.04.6 LTS (bionic) | 1:68.7.0+build1-0ubuntu0.18.04.1 | [xul-ext-gdata-provider 1:68.7.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-gdata-provider-1-68.7.0-build1-0ubuntu0.18.04.1.md) | Apr 6, 2020 | | Linux | xul-ext-gdata-provider Ubuntu 20.04 LTS (focal) | 1:68.5.0+build1-0ubuntu1 | [xul-ext-gdata-provider 1:68.5.0+build1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-gdata-provider-1-68.5.0-build1-0ubuntu1.md) | Feb 10, 2020 | | Linux | xul-ext-lightning Ubuntu 18.04.6 LTS (bionic) | 1:68.7.0+build1-0ubuntu0.18.04.1 | [xul-ext-lightning 1:68.7.0+build1-0ubuntu0.18.04.1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-xul-ext-lightning-1-68.7.0-build1-0ubuntu0.18.04.1.md) | Apr 6, 2020 | | Linux | xul-ext-lightning Ubuntu 20.04 LTS (focal) | 1:68.5.0+build1-0ubuntu1 | [xul-ext-lightning 1:68.5.0+build1-0ubuntu1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-xul-ext-lightning-1-68.5.0-build1-0ubuntu1.md) | Feb 10, 2020 | --- Data as of 2026-11-08T00:53:09Z UTC. 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