VULNERABILITY INTELLIGENCE
CVE-2019-17016
CVSS score6.1 MEDIUM
EPSS probability1.99%
CISA KEVNot currently listed
Published2020-01-08
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Description
When pasting a <style> tag from the clipboard into a rich text editor, the CSS sanitizer incorrectly rewrites a @namespace rule. This could allow for injection into certain types of websites resulting in data exfiltration. This vulnerability affects Firefox ESR < 68.4 and Firefox < 72.
Weakness classification
- CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Primary references
- security@mozilla.org
- security@mozilla.org
- security@mozilla.org
- security@mozilla.org — Third Party Advisory
- security@mozilla.org — Third Party Advisory
- security@mozilla.org
- security@mozilla.org
- security@mozilla.org
- security@mozilla.org
- security@mozilla.org
- security@mozilla.org
- security@mozilla.org — Permissions Required