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.
Published 2020-01-08 22:15:13
Updated 2020-01-13 20:15:13
View at NVD,   CVE.org
Vulnerability category: Cross site scripting (XSS)

Exploit prediction scoring system (EPSS) score for CVE-2019-17022

Probability of exploitation activity in the next 30 days: 0.35%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 69 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2019-17022

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source
4.3
MEDIUM AV:N/AC:M/Au:N/C:N/I:P/A:N
8.6
2.9
nvd@nist.gov
6.1
MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
2.8
2.7
nvd@nist.gov

CWE ids for CVE-2019-17022

References for CVE-2019-17022

Products affected by CVE-2019-17022

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