Cross-site Scripting (XSS) Affecting firefox package, versions <0:78.3.0-1.el8_2


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.66% (81st percentile)

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  • Snyk IDSNYK-RHEL8-FIREFOX-3804343
  • published26 Jul 2021
  • disclosed22 Sept 2020

Introduced: 22 Sep 2020

CVE-2020-15676  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

Upgrade RHEL:8 firefox to version 0:78.3.0-1.el8_2 or higher.
This issue was patched in RHSA-2020:3832.

NVD Description

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

Firefox sometimes ran the onload handler for SVG elements that the DOM sanitizer decided to remove, resulting in JavaScript being executed after pasting attacker-controlled data into a contenteditable element. This vulnerability affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.

CVSS Scores

version 3.1