What’s Vulnerable › Vulnerabilities

CVE-2019-17000

• Severity: medium (CVSS 6.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-01-08 · updated 2026-06-17
• Weakness: CWE-79

Description

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.

Affected products

• Mozilla Firefox: before 70.0 — fixed in 70.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 70.0. Check the vendor advisory for mitigations.

References

• https://bugzilla.mozilla.org/show_bug.cgi?id=1441468
• https://www.mozilla.org/security/advisories/mfsa2019-34/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1441468
• https://www.mozilla.org/security/advisories/mfsa2019-34/

Get alerted when CVE-2019-17000 or the next vulnerability affects your stack