Cross-site Scripting (XSS) Affecting firefox package, versions <81.0+build2-0ubuntu0.18.04.1


0.0
medium

Snyk CVSS

    Attack Complexity Low
    User Interaction Required
    Scope Changed

    Threat Intelligence

    EPSS 0.57% (78th percentile)
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NVD
6.1 medium
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Red Hat
6.1 medium
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SUSE
6.1 medium

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  • Snyk ID SNYK-UBUNTU1804-FIREFOX-1013292
  • published 26 Sep 2020
  • disclosed 1 Oct 2020

How to fix?

Upgrade Ubuntu:18.04 firefox to version 81.0+build2-0ubuntu0.18.04.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream firefox package and not the firefox package as distributed by Ubuntu. See How to fix? for Ubuntu:18.04 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.