by Kastro
Paper/Archive/CVE-2021-4140

CVE-2021-4140

Mozilla Firefox ESR — It was possible to construct specific XSLT markup that would be able to bypass an iframe sandbox.

EPSS 1%public exploitCVSS 10.0
critical.is priorityof 100
55
CVSS 10.0 (NVD)10.0 / 10 × 3030.0Not in CISA KEV+300.0EPSS percentile 72.6.726 × 2014.5Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Firefox ESRunspecified – < 91.591.5CNA
Firefoxunspecified – < 9696CNA
Thunderbirdunspecified – < 91.591.5CNA

Scores by source

NVD10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

refmozilla.org/security/advisories/mfsa2022-01refmozilla.org/security/advisories/mfsa2022-02refmozilla.org/security/advisories/mfsa2022-03refbugzilla.mozilla.org/show_bug.cgi?id=1746720