Incorrect Authorization Affecting firefox package, versions <0:91.3.0-1.el8_4.alma


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.53% (78th percentile)

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  • Snyk IDSNYK-ALMALINUX8-FIREFOX-5610367
  • published28 May 2023
  • disclosed4 Nov 2021

Introduced: 4 Nov 2021

CVE-2021-38503  (opens in a new tab)
CWE-863  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 firefox to version 0:91.3.0-1.el8_4.alma or higher.
This issue was patched in ALSA-2021:4123.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox package and not the firefox package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

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.

CVSS Scores

version 3.1