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CVE-2021-38503

Public on 2021-12-08
Modified on 2022-08-23
Description

The iframe sandbox rules were not correctly applied to XSLT stylesheets, allowing an iframe to bypass restrictions such as executing scripts or navigating the top-level frame. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.

Severity
Important
See what this means
CVSS v3 Base Score
10.0
See breakdown

Affected Packages

Platform Package Release Date Advisory
Amazon Linux 2 - Core thunderbird 2022-07-06 03:17 ALAS2-2022-1818

CVSS Scores

Score Type Score Vector
Amazon Linux CVSSv3 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD CVSSv2 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P
NVD CVSSv3 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H