Incorrect Authorization Affecting firefox-esr package, versions <91.3.0esr-1


Severity

Recommended
0.0
critical
0
10

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Threat Intelligence

EPSS
0.53% (78th percentile)

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  • Snyk IDSNYK-DEBIAN12-FIREFOXESR-1909774
  • published3 Nov 2021
  • disclosed8 Dec 2021

Introduced: 3 Nov 2021

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

How to fix?

Upgrade Debian:12 firefox-esr to version 91.3.0esr-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox-esr package and not the firefox-esr package as distributed by Debian. See How to fix? for Debian:12 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