Is CVE-2019-11721 in the CISA KEV catalog?

No. CVE-2019-11721 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2019-11721?

CVE-2019-11721 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2019-11721?

CVE-2019-11721 has an EPSS score of 1.39% (69th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2019-11721?

Upgrade firefox on debian unstable to 68.0-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2019-11721

MEDIUM

6.5

CVSS v3

NVD

Description

The unicode latin 'kra' character can be used to spoof a standard 'k' character in the addressbar. This allows for domain spoofing attacks as do not display as punycode text, allowing for user confusion. This vulnerability affects Firefox < 68.

How to fix

Remediation Available

firefoxDebian

Fixed in:68.0-1CVE-2019-11721

firefoxUbuntu

Fixed in:68.0+build3-0ubuntu0.16.04.1USN-4054-1

Fixed in:68.0+build3-0ubuntu0.18.04.1USN-4054-1

DeveloperEditionWindows application

Affected:68.0Fixed in:68.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:68.0Fixed in:68.0Mozilla

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Exploit Intelligence

1.39%probability of exploitation in 30 days

69thpercentile

Moderate risk: more likely to be exploited than 69% of all known CVEs.

References

Exploit1

bugzilla.mozilla.org

Vendor Advisory1

mozilla.org

Third-Party Advisory5

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.