CVE-2019-11721: Mozilla Firefox vulnerability

CVE-2019-11721: The unicode latin 'kra' character can be used to spoof a standard 'k' character in the addressbar.

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.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 4, 2024, 23:03 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2019-11721 lets a malicious domain visually impersonate another domain in Firefox's address bar by using the Unicode latin kra character, which can look like a standard k. The main business risk is phishing and user misdirection, not server compromise. Exposure is limited to users running Mozilla Firefox before version 68, including distribution-packaged Firefox builds referenced by Gentoo and openSUSE advisories. Treat as a moderate-priority browser hygiene issue. Prioritize remediation where legacy Firefox is used for email, web access, or high-risk business workflows. Mitigation focus: Upgrade Firefox to version 68 or later.; Apply relevant Gentoo or openSUSE Firefox security updates.; Check Mozilla guidance for any vendor-specific fixed builds..

Prepared: Jun 6, 2026, 14:06 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Jul 23, 2019, 13:17 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

4Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://www.mozilla.org/security/advisories/mfsa2019-21/CVE reference · x_refsource_MISC
https://bugzilla.mozilla.org/show_bug.cgi?id=1256009CVE reference · x_refsource_MISC
GLSA-201908-12CVE reference · vendor-advisory, x_refsource_GENTOO

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

MozillaFirefoxunspecifiedListed

Weakness

CWE details

No CWE listed

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