CVE-2021-4140
Mozilla Firefox ESR and 3 others: XML Injection (aka Blind XPath Injection)
CVE-2021-4140 is fixed in 12 products on 2 platforms, first by Mozilla Thunderbird (en-US) 91.5.0, released January 6, 2022. It is not reported as exploited. Patch Radar priority: High.
HighFixed on 2 platforms
CVSS
10.0
Important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0141
72nd percentile
It was possible to construct specific XSLT markup that would be able to bypass an iframe sandbox. This vulnerability affects Firefox ESR < 91.5, Firefox < 96, and Thunderbird < 91.5.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Windows apps | |||
| Mozilla Firefox ESR (en-US) | 102.0 | Mozilla Firefox ESR (en-US) 102.0 | Jun 23, 2022 |
| Mozilla Thunderbird (en-US) | 91.5.0 | Mozilla Thunderbird (en-US) 91.5.0 | Jan 6, 2022 |
| Linux | |||
| firefox · RHEL 8 | 0:91.5.0-1.el8_5 | RHSA-2022:0130 | Jan 12, 2022 |
| firefox · Ubuntu 18.04.6 LTS (bionic) | 96.0+build2-0ubuntu0.18.04.1 | firefox 96.0+build2-0ubuntu0.18.04.1 | Jan 12, 2022 |
| firefox · Ubuntu 20.04 LTS (focal) | 96.0+build2-0ubuntu0.20.04.1 | firefox 96.0+build2-0ubuntu0.20.04.1 | Jan 12, 2022 |
| firefox · Ubuntu 22.04.1 LTS (jammy) | 96.0+build2-0ubuntu1 | firefox 96.0+build2-0ubuntu1 | Jan 12, 2022 |
| firefox · almalinux 8 | 91.5.0-1.el8_5.alma | ALSA-2022:0130 | Jan 12, 2022 |
| firefox · ol 8 | 0:91.5.0-1.0.1.el8_5 | ELSA-2022-0130 | Jan 13, 2022 |
| firefox · rocky 8 | 0:91.5.0-1.el8_5 | RLSA-2022:0130 | Jan 12, 2022 |
| firefox-esr · Debian 11.6 (bullseye) | 91.5.0esr-1~deb11u1 | DSA-5044-1 | Jan 13, 2022 |
| firefox-esr · Debian 12.15 (bookworm) | 91.5.0esr-1 | DEBIAN-CVE-2021-4140 | Dec 22, 2022 |
| firefox-esr · Debian 13.5 (trixie) | 91.5.0esr-1 | DEBIAN-CVE-2021-4140 | Dec 22, 2022 |
| firefox-esr · Debian 14 | 91.5.0esr-1 | DEBIAN-CVE-2021-4140 | Dec 22, 2022 |
| firefox-geckodriver · Ubuntu 18.04.6 LTS (bionic) | 96.0+build2-0ubuntu0.18.04.1 | firefox-geckodriver 96.0+build2-0ubuntu0.18.04.1 | Jan 12, 2022 |
| firefox-geckodriver · Ubuntu 20.04 LTS (focal) | 96.0+build2-0ubuntu0.20.04.1 | firefox-geckodriver 96.0+build2-0ubuntu0.20.04.1 | Jan 12, 2022 |
| firefox-geckodriver · Ubuntu 22.04.1 LTS (jammy) | 96.0+build2-0ubuntu1 | firefox-geckodriver 96.0+build2-0ubuntu1 | Jan 12, 2022 |
| firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 96.0+build2-0ubuntu0.18.04.1 | firefox-mozsymbols 96.0+build2-0ubuntu0.18.04.1 | Jan 12, 2022 |
| firefox-mozsymbols · Ubuntu 20.04 LTS (focal) | 96.0+build2-0ubuntu0.20.04.1 | firefox-mozsymbols 96.0+build2-0ubuntu0.20.04.1 | Jan 12, 2022 |
| firefox-mozsymbols · Ubuntu 22.04.1 LTS (jammy) | 96.0+build2-0ubuntu1 | firefox-mozsymbols 96.0+build2-0ubuntu1 | Jan 12, 2022 |
| thunderbird · Debian 11.6 (bullseye) | 1:91.5.0-2~deb11u1 | DSA-5045-1 | Jan 14, 2022 |
| thunderbird · Debian 12.15 (bookworm) | 1:91.5.0-1 | DEBIAN-CVE-2021-4140 | Dec 22, 2022 |
| thunderbird · Debian 13.5 (trixie) | 1:91.5.0-1 | DEBIAN-CVE-2021-4140 | Dec 22, 2022 |
| thunderbird · Debian 14 | 1:91.5.0-1 | DEBIAN-CVE-2021-4140 | Dec 22, 2022 |
| thunderbird · RHEL 8 | 0:91.5.0-1.el8_5 | RHSA-2022:0129 | Jan 12, 2022 |
| thunderbird · Ubuntu 18.04.6 LTS (bionic) | 1:91.5.0+build1-0ubuntu0.18.04.1 | thunderbird 1:91.5.0+build1-0ubuntu0.18.04.1 | Feb 16, 2023 |
| thunderbird · Ubuntu 20.04 LTS (focal) | 1:91.5.0+build1-0ubuntu0.20.04.1 | thunderbird 1:91.5.0+build1-0ubuntu0.20.04.1 | Feb 16, 2023 |
| thunderbird · Ubuntu 22.04.1 LTS (jammy) | 1:91.5.0+build1-0ubuntu1 | thunderbird 1:91.5.0+build1-0ubuntu1 | Jan 12, 2022 |
| thunderbird · almalinux 8 | 91.5.0-1.el8_5.alma.plus | ALSA-2022:0129 | Jan 12, 2022 |
| thunderbird · ol 8 | 0:91.5.0-1.0.1.el8_5 | ELSA-2022-0129 | Jan 13, 2022 |
| thunderbird · rocky 8 | 0:91.5.0-1.el8_5 | RLSA-2022:0129 | Jan 12, 2022 |
| thunderbird-gnome-support · Ubuntu 18.04.6 LTS (bionic) | 1:91.5.0+build1-0ubuntu0.18.04.1 | thunderbird-gnome-support 1:91.5.0+build1-0ubuntu0.18.04.1 | Feb 16, 2023 |
| thunderbird-gnome-support · Ubuntu 20.04 LTS (focal) | 1:91.5.0+build1-0ubuntu0.20.04.1 | thunderbird-gnome-support 1:91.5.0+build1-0ubuntu0.20.04.1 | Feb 16, 2023 |
| thunderbird-gnome-support · Ubuntu 22.04.1 LTS (jammy) | 1:91.5.0+build1-0ubuntu1 | thunderbird-gnome-support 1:91.5.0+build1-0ubuntu1 | Jan 12, 2022 |
| thunderbird-mozsymbols · Ubuntu 18.04.6 LTS (bionic) | 1:91.5.0+build1-0ubuntu0.18.04.1 | thunderbird-mozsymbols 1:91.5.0+build1-0ubuntu0.18.04.1 | Feb 16, 2023 |
| thunderbird-mozsymbols · Ubuntu 20.04 LTS (focal) | 1:91.5.0+build1-0ubuntu0.20.04.1 | thunderbird-mozsymbols 1:91.5.0+build1-0ubuntu0.20.04.1 | Feb 16, 2023 |
| thunderbird-mozsymbols · Ubuntu 22.04.1 LTS (jammy) | 1:91.5.0+build1-0ubuntu1 | thunderbird-mozsymbols 1:91.5.0+build1-0ubuntu1 | Jan 12, 2022 |
| xul-ext-calendar-timezones · Ubuntu 18.04.6 LTS (bionic) | 1:91.5.0+build1-0ubuntu0.18.04.1 | xul-ext-calendar-timezones 1:91.5.0+build1-0ubuntu0.18.04.1 | Feb 16, 2023 |
| xul-ext-calendar-timezones · Ubuntu 20.04 LTS (focal) | 1:91.5.0+build1-0ubuntu0.20.04.1 | xul-ext-calendar-timezones 1:91.5.0+build1-0ubuntu0.20.04.1 | Feb 16, 2023 |
| xul-ext-calendar-timezones · Ubuntu 22.04.1 LTS (jammy) | 1:91.5.0+build1-0ubuntu1 | xul-ext-calendar-timezones 1:91.5.0+build1-0ubuntu1 | Jan 12, 2022 |
| xul-ext-gdata-provider · Ubuntu 18.04.6 LTS (bionic) | 1:91.5.0+build1-0ubuntu0.18.04.1 | xul-ext-gdata-provider 1:91.5.0+build1-0ubuntu0.18.04.1 | Feb 16, 2023 |
| xul-ext-gdata-provider · Ubuntu 20.04 LTS (focal) | 1:91.5.0+build1-0ubuntu0.20.04.1 | xul-ext-gdata-provider 1:91.5.0+build1-0ubuntu0.20.04.1 | Feb 16, 2023 |
| xul-ext-gdata-provider · Ubuntu 22.04.1 LTS (jammy) | 1:91.5.0+build1-0ubuntu1 | xul-ext-gdata-provider 1:91.5.0+build1-0ubuntu1 | Jan 12, 2022 |
| xul-ext-lightning · Ubuntu 18.04.6 LTS (bionic) | 1:91.5.0+build1-0ubuntu0.18.04.1 | xul-ext-lightning 1:91.5.0+build1-0ubuntu0.18.04.1 | Feb 16, 2023 |
| xul-ext-lightning · Ubuntu 20.04 LTS (focal) | 1:91.5.0+build1-0ubuntu0.20.04.1 | xul-ext-lightning 1:91.5.0+build1-0ubuntu0.20.04.1 | Feb 16, 2023 |
| xul-ext-lightning · Ubuntu 22.04.1 LTS (jammy) | 1:91.5.0+build1-0ubuntu1 | xul-ext-lightning 1:91.5.0+build1-0ubuntu1 | Jan 12, 2022 |
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