CVE-2021-4140

State: Published
Severity: 9.8 Critical
Published: Dec 22, 2022
Updated: Apr 16, 2025
Reserved: Dec 20, 2021

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-91 XML Injection (aka Blind XPath Injection)

Affected Products

Product	Versions
Firefox ESRMozilla	before 91.5Affected
FirefoxMozilla	before 96Affected
ThunderbirdMozilla	before 91.5Affected

References

https://www.mozilla.org/security/advisories/mfsa2022-01/
https://www.mozilla.org/security/advisories/mfsa2022-02/
https://www.mozilla.org/security/advisories/mfsa2022-03/
https://bugzilla.mozilla.org/show_bug.cgi?id=1746720

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