What is CVE-2019-17000?

CVE-2019-17000 is a medium-severity vulnerability in Mozilla Firefox, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-01-08.

How severe is CVE-2019-17000?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Mozilla Firefox

CVE-2019-17000

An object tag with a data URI did not correctly inherit the document's Content Security Policy. This allowed a CSP bypass in a cross-origin frame if the document's policy explicitly allowed data: URIs. This vulnerability affects Firefox < 70.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.008 (53.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Mozilla Firefox — versions before 70

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security@mozilla.org (Permissions Required, x_refsource_MISC)
security@mozilla.org (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2019-17000?: CVE-2019-17000 is a medium-severity vulnerability in Mozilla Firefox, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2020-01-08.
How severe is CVE-2019-17000?: Medium severity. CVSS v3 base score is 6.1 out of 10.