SARA / Free Tools / CVE / CVE-2019-17016

CVE-2019-17016 — When pasting a <style> tag from the clipboard into a rich text editor, the

When pasting a &lt;style&gt; 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 <

CVSS
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EPSS
3.46% (top 12.60%)
CWE
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Published
2020-01-08T21:27:03.000Z
Last modified
2024-08-05T01:24:48.588Z
CVSS vector
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01What is this vulnerability?

When pasting a &lt;style&gt; 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.

02Affected products

VendorProductVersions
MozillaFirefox ESRbefore 68.4
MozillaFirefoxbefore 72

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

09References

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