CVE-2019-17022
When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer does not escape < and
When pasting a <style>.
tag from the clipboard into a rich text editor, the CSS sanitizer does not escape <.
and >.
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.
MEDIUM · CVSS 6.1
EPSS 0.02423
Schedule remediation
- Public exploit or PoC is available
Sigma rules1
YARA rules0