Cross-site Scripting (XSS) Affecting thunderbird package, versions <1:68.4.1-1


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.24% (65th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-THUNDERBIRD-541487
  • published7 Jan 2020
  • disclosed8 Jan 2020

Introduced: 7 Jan 2020

CVE-2019-17022  (opens in a new tab)
CWE-79  (opens in a new tab)

How to fix?

Upgrade Debian:unstable thunderbird to version 1:68.4.1-1 or higher.

NVD Description

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

When pasting a &lt;style&gt; tag from the clipboard into a rich text editor, the CSS sanitizer does not escape &lt; and &gt; characters. Because the resulting string is pasted directly into the text node of the element this does not result in a direct injection into the webpage; however, if a webpage subsequently copies the node's innerHTML, assigning it to another innerHTML, this would result in an XSS vulnerability. Two WYSIWYG editors were identified with this behavior, more may exist. This vulnerability affects Firefox ESR < 68.4 and Firefox < 72.

CVSS Scores

version 3.1