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Cross-site Scripting (XSS) The advisory has been revoked - it doesn't affect any version of package thunderbird  (opens in a new tab)

Threat Intelligence

EPSS
2.92% (86th percentile)

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  • Snyk IDSNYK-UBUNTU2004-THUNDERBIRD-581661
  • published7 Jan 2020
  • disclosed8 Jan 2020
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Introduced: 7 Jan 2020

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

Amendment

The Ubuntu security team deemed this advisory irrelevant for Ubuntu:20.04.

NVD Description

Note: Versions mentioned in the description apply only to the upstream thunderbird package and not the thunderbird package as distributed by Ubuntu.

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.

References