CVE-2019-17022

MediumCVSS 6.1/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 6.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Weakness enumeration

CWE-79

Affected software

VendorProductVersions
MozillaFirefox ESRbefore 68.4
MozillaFirefoxbefore 72

References

Timeline

Published
Jan 8, 2020
Last modified
Jun 17, 2026
NVD status
Modified

Related CVEs from 2019

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CVE-2019-17022: Medium severity, CVSS 6.1 | Vulnix