Rapid7 Vulnerability & Exploit Database

Red Hat: CVE-2021-38503: CVE-2021-38503 Mozilla: iframe sandbox rules did not apply to XSLT stylesheets (Multiple Advisories)

Free InsightVM Trial No Credit Card Necessary
2024 Attack Intel Report Latest research by Rapid7 Labs
Back to Search

Red Hat: CVE-2021-38503: CVE-2021-38503 Mozilla: iframe sandbox rules did not apply to XSLT stylesheets (Multiple Advisories)

Severity
8
CVSS
(AV:N/AC:L/Au:N/C:P/I:P/A:P)
Published
11/03/2021
Created
11/10/2021
Added
11/09/2021
Modified
11/26/2024

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.

Solution(s)

  • redhat-upgrade-firefox
  • redhat-upgrade-firefox-debuginfo
  • redhat-upgrade-firefox-debugsource
  • redhat-upgrade-thunderbird
  • redhat-upgrade-thunderbird-debuginfo
  • redhat-upgrade-thunderbird-debugsource

References

  • CVE-2021-38503
  • RHSA-2021:4116
  • RHSA-2021:4123
  • RHSA-2021:4130
  • RHSA-2021:4132
  • RHSA-2021:4133
  • RHSA-2021:4134
  • RHSA-2021:4605
  • RHSA-2021:4607
View more

insightVM

Advanced vulnerability management analytics and reporting.
Key Features
  • Lightweight Endpoint Agent
  • Live Dashboards
  • Real Risk Prioritization
  • IT-Integrated Remediation Projects
  • Cloud, Virtual, and Container Assessment
  • Integrated Threat Feeds
  • Easy-to-Use RESTful API
  • Automation-Assisted Patching
  • Automated Containment
Free InsightVM Trial View All Features

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;